diff --git a/main/SS/Formula/Atp/XLookupFunction.cs b/main/SS/Formula/Atp/XLookupFunction.cs
index f064114f9..0e0284ae4 100644
--- a/main/SS/Formula/Atp/XLookupFunction.cs
+++ b/main/SS/Formula/Atp/XLookupFunction.cs
@@ -6,7 +6,7 @@ using System.Text;
 
 namespace NPOI.SS.Formula.Atp
 {
-    class XLookupFunction : FreeRefFunction, ArrayFunction
+    class XLookupFunction : FreeRefFunction, IArrayFunction
     {
         public static FreeRefFunction instance = new XLookupFunction(ArgumentsEvaluator.instance);
 
diff --git a/main/SS/Formula/Eval/RelationalOperationEval/RelationalOperationEval.cs b/main/SS/Formula/Eval/RelationalOperationEval/RelationalOperationEval.cs
index 6ce1ed892..c6959402c 100644
--- a/main/SS/Formula/Eval/RelationalOperationEval/RelationalOperationEval.cs
+++ b/main/SS/Formula/Eval/RelationalOperationEval/RelationalOperationEval.cs
@@ -35,7 +35,7 @@ namespace NPOI.SS.Formula.Eval
      * @author Amol S. Deshmukh < amolweb at ya hoo Dot com >
      *
      */
-    public abstract class RelationalOperationEval : Fixed2ArgFunction, ArrayFunction
+    public abstract class RelationalOperationEval : Fixed2ArgFunction, IArrayFunction
     {
         private static int DoCompare(ValueEval va, ValueEval vb)
         {
diff --git a/main/SS/Formula/Eval/TwoOperandNumeric/TwoOperandNumericOperation.cs b/main/SS/Formula/Eval/TwoOperandNumeric/TwoOperandNumericOperation.cs
index 62a7a79ed..779fbbc07 100644
--- a/main/SS/Formula/Eval/TwoOperandNumeric/TwoOperandNumericOperation.cs
+++ b/main/SS/Formula/Eval/TwoOperandNumeric/TwoOperandNumericOperation.cs
@@ -4,7 +4,7 @@ using NPOI.SS.Formula.Functions;
 namespace NPOI.SS.Formula.Eval
 {
 
-    public abstract class TwoOperandNumericOperation : Fixed2ArgFunction, ArrayFunction
+    public abstract class TwoOperandNumericOperation : Fixed2ArgFunction, IArrayFunction
     {
         protected double SingleOperandEvaluate(ValueEval arg, int srcCellRow, int srcCellCol)
         {
diff --git a/main/SS/Formula/Functions/ArrayFunction.cs b/main/SS/Formula/Functions/ArrayFunction.cs
index f6f1aaff9..c601104ef 100644
--- a/main/SS/Formula/Functions/ArrayFunction.cs
+++ b/main/SS/Formula/Functions/ArrayFunction.cs
@@ -1,11 +1,13 @@
-using NPOI.SS.Formula.Eval;
+using NPOI.SS.Formula;
+using NPOI.SS.Formula.Eval;
+using NPOI.Util;
 using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace NPOI.SS.Formula.Functions
 {
-    public interface ArrayFunction
+    public interface IArrayFunction
     {
         /// <summary>
         /// - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to Double#NaN be sure to translate the result to ErrorEval#NUM_ERROR.
@@ -16,4 +18,238 @@ namespace NPOI.SS.Formula.Functions
         /// <returns> The evaluated result, possibly an ErrorEval, never <code>null</code></returns>
         ValueEval EvaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex);
     }
+
+    public class ArrayFunction
+    {
+        /// <summary>
+        /// Evaluate an array function with two arguments.
+        /// </summary>
+        /// <param name="arg0">the first function argument. Empty values are represented with <see cref="BlankEval"/> or <see cref="MissingArgEval"/>, never <c>null</c></param>
+        /// <param name="arg1">the second function argument. Empty values are represented with <see cref="BlankEval"/> or <see cref="MissingArgEval"/>, never <c>null</c></param>
+        /// <param name="srcRowIndex">row index of the cell containing the formula under evaluation</param>
+        /// <param name="srcColumnIndex">column index of the cell containing the formula under evaluation</param>
+        /// <param name="evalFunc"></param>
+        /// <returns>The evaluated result, possibly an <see cref="ErrorEval"/>, never <c>null</c>.
+        /// <b>Note</b> - Excel uses the error code <i>#NUM!</i> instead of IEEE <i>NaN</i>, so when
+        /// numeric functions evaluate to <see cref="double.NaN"/> be sure to translate the result to 
+        /// <see cref="ErrorEval.NUM_ERROR"/>. </returns>
+        public ValueEval EvaluateTwoArrayArgs(ValueEval arg0, ValueEval arg1, int srcRowIndex, int srcColumnIndex,
+                                           Func<ValueEval, ValueEval, ValueEval> evalFunc)
+        {
+            return _evaluateTwoArrayArgs(arg0, arg1, srcRowIndex, srcColumnIndex, evalFunc);
+        }
+
+        public ValueEval EvaluateOneArrayArg(ValueEval arg0, int srcRowIndex, int srcColumnIndex,
+                                          Func<ValueEval, ValueEval> evalFunc)
+        {
+            return _evaluateOneArrayArg(arg0, srcRowIndex, srcColumnIndex, evalFunc);
+        }
+
+        internal static ValueEval _evaluateTwoArrayArgs(ValueEval arg0, ValueEval arg1, int srcRowIndex, int srcColumnIndex,
+            Func<ValueEval, ValueEval, ValueEval> evalFunc)
+        {
+            int w1, w2, h1, h2;
+            int a1FirstCol = 0, a1FirstRow = 0;
+            if(arg0 is AreaEval)
+            {
+                AreaEval ae = (AreaEval)arg0;
+                w1 = ae.Width;
+                h1 = ae.Height;
+                a1FirstCol = ae.FirstColumn;
+                a1FirstRow = ae.FirstRow;
+            }
+            else if(arg0 is RefEval)
+            {
+                RefEval ref1 = (RefEval)arg0;
+                w1 = 1;
+                h1 = 1;
+                a1FirstCol = ref1.Column;
+                a1FirstRow = ref1.Row;
+            }
+            else
+            {
+                w1 = 1;
+                h1 = 1;
+            }
+            int a2FirstCol = 0, a2FirstRow = 0;
+            if(arg1 is AreaEval)
+            {
+                AreaEval ae = (AreaEval)arg1;
+                w2 = ae.Width;
+                h2 = ae.Height;
+                a2FirstCol = ae.FirstColumn;
+                a2FirstRow = ae.FirstRow;
+            }
+            else if(arg1 is RefEval)
+            {
+                RefEval ref1 = (RefEval)arg1;
+                w2 = 1;
+                h2 = 1;
+                a2FirstCol = ref1.Column;
+                a2FirstRow = ref1.Row;
+            }
+            else
+            {
+                w2 = 1;
+                h2 = 1;
+            }
+
+            int width = Math.Max(w1, w2);
+            int height = Math.Max(h1, h2);
+
+            ValueEval[] vals = new ValueEval[height * width];
+
+            int idx = 0;
+            for(int i = 0; i < height; i++)
+            {
+                for(int j = 0; j < width; j++)
+                {
+                    ValueEval vA;
+                    try
+                    {
+                        vA = OperandResolver.GetSingleValue(arg0, a1FirstRow + i, a1FirstCol + j);
+                    }
+                    catch(FormulaParseException e)
+                    {
+                        vA = ErrorEval.NAME_INVALID;
+                    }
+                    catch(EvaluationException e)
+                    {
+                        vA = e.GetErrorEval();
+                    }
+                    catch(RuntimeException e)
+                    {
+                        if(e.Message.StartsWith("Don't know how to evaluate name"))
+                        {
+                            vA = ErrorEval.NAME_INVALID;
+                        }
+                        else
+                        {
+                            throw;
+                        }
+                    }
+                    ValueEval vB;
+                    try
+                    {
+                        vB = OperandResolver.GetSingleValue(arg1, a2FirstRow + i, a2FirstCol + j);
+                    }
+                    catch(FormulaParseException e)
+                    {
+                        vB = ErrorEval.NAME_INVALID;
+                    }
+                    catch(EvaluationException e)
+                    {
+                        vB = e.GetErrorEval();
+                    }
+                    catch(RuntimeException e)
+                    {
+                        if(e.Message.StartsWith("Don't know how to evaluate name"))
+                        {
+                            vB = ErrorEval.NAME_INVALID;
+                        }
+                        else
+                        {
+                            throw;
+                        }
+                    }
+                    if(vA is ErrorEval)
+                    {
+                        vals[idx++] = vA;
+                    }
+                    else if(vB is ErrorEval)
+                    {
+                        vals[idx++] = vB;
+                    }
+                    else
+                    {
+                        vals[idx++] = evalFunc.Invoke(vA, vB);
+                    }
+
+                }
+            }
+
+            if(vals.Length == 1)
+            {
+                return vals[0];
+            }
+
+            return new CacheAreaEval(srcRowIndex, srcColumnIndex, srcRowIndex + height - 1, srcColumnIndex + width - 1, vals);
+        }
+
+
+        internal static ValueEval _evaluateOneArrayArg(ValueEval arg0, int srcRowIndex, int srcColumnIndex,
+            Func<ValueEval, ValueEval> evalFunc)
+        {
+            int w1, w2, h1, h2;
+            int a1FirstCol = 0, a1FirstRow = 0;
+            if(arg0 is AreaEval)
+            {
+                AreaEval ae = (AreaEval)arg0;
+                w1 = ae.Width;
+                h1 = ae.Height;
+                a1FirstCol = ae.FirstColumn;
+                a1FirstRow = ae.FirstRow;
+            }
+            else if(arg0 is RefEval)
+            {
+                RefEval ref1 = (RefEval)arg0;
+                w1 = 1;
+                h1 = 1;
+                a1FirstCol = ref1.Column;
+                a1FirstRow = ref1.Row;
+            }
+            else
+            {
+                w1 = 1;
+                h1 = 1;
+            }
+            w2 = 1;
+            h2 = 1;
+
+            int width = Math.Max(w1, w2);
+            int height = Math.Max(h1, h2);
+
+            ValueEval[] vals = new ValueEval[height * width];
+
+            int idx = 0;
+            for(int i = 0; i < height; i++)
+            {
+                for(int j = 0; j < width; j++)
+                {
+                    ValueEval vA;
+                    try
+                    {
+                        vA = OperandResolver.GetSingleValue(arg0, a1FirstRow + i, a1FirstCol + j);
+                    }
+                    catch(FormulaParseException e)
+                    {
+                        vA = ErrorEval.NAME_INVALID;
+                    }
+                    catch(EvaluationException e)
+                    {
+                        vA = e.GetErrorEval();
+                    }
+                    catch(RuntimeException e)
+                    {
+                        if(e.Message.StartsWith("Don't know how to evaluate name"))
+                        {
+                            vA = ErrorEval.NAME_INVALID;
+                        }
+                        else
+                        {
+                            throw;
+                        }
+                    }
+                    vals[idx++] = evalFunc.Invoke(vA);
+                }
+            }
+
+            if(vals.Length == 1)
+            {
+                return vals[0];
+            }
+
+            return new CacheAreaEval(srcRowIndex, srcColumnIndex, srcRowIndex + height - 1, srcColumnIndex + width - 1, vals);
+        }
+    }
 }
diff --git a/main/SS/Formula/Functions/Boolean/BooleanFunction.cs b/main/SS/Formula/Functions/Boolean/BooleanFunction.cs
index 18956cd7d..bd0512575 100644
--- a/main/SS/Formula/Functions/Boolean/BooleanFunction.cs
+++ b/main/SS/Formula/Functions/Boolean/BooleanFunction.cs
@@ -87,11 +87,7 @@ namespace NPOI.SS.Formula.Functions
                     }
                     continue;
                 }
-                //else if (arg is ValueEval)
-                //{
-                //    ValueEval ve = (ValueEval)arg;
-                //    tempVe = OperandResolver.CoerceValueToBoolean(ve, false);
-                //}
+
                 if (arg == MissingArgEval.instance)
                 {
                     tempVe = false; // missing parameters are treated as FALSE
@@ -133,5 +129,72 @@ namespace NPOI.SS.Formula.Functions
             }
             return BoolEval.ValueOf(boolResult);
         }
+        
+        public static Function FALSE = new FALSEFunction();
+
+        public static Function TRUE = new TRUEFunction();
+
+        public static Function NOT = new NOTFunction();
+
+        public ValueEval EvaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex) 
+        {
+            return Evaluate(args, srcRowIndex, srcColumnIndex);
+        }
+        public class FALSEFunction : Function
+        {
+            public ValueEval Evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+            {
+                return EvaluateFalse(args, srcRowIndex, srcColumnIndex);
+            }
+        }
+
+        public class TRUEFunction : Function
+        {
+            public ValueEval Evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+            {
+                return EvaluateTrue(args, srcRowIndex, srcColumnIndex);
+            }
+        }
+
+        public class NOTFunction : Function
+        {
+            public ValueEval Evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+            {
+                return EvaluateNot(args, srcRowIndex, srcColumnIndex);
+            }
+        }
+
+
+        private static ValueEval EvaluateFalse(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+        {
+            return args.Length != 0 ? ErrorEval.VALUE_INVALID : BoolEval.FALSE;
+        }
+
+        private static ValueEval EvaluateTrue(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+        {
+            return args.Length != 0 ? ErrorEval.VALUE_INVALID : BoolEval.TRUE;
+        }
+
+        private static ValueEval EvaluateNot(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
+        {
+            if (args.Length != 1)
+            {
+                return ErrorEval.VALUE_INVALID;
+            }
+            
+            Func<ValueEval, ValueEval> notInner = (va) => {
+                try
+                {
+                    ValueEval ve = OperandResolver.GetSingleValue(va, srcRowIndex, srcColumnIndex);
+                    bool? b = OperandResolver.CoerceValueToBoolean(ve, false);
+                    bool boolArgVal = b.HasValue && b.Value;
+                    return BoolEval.ValueOf(!boolArgVal);
+                } catch (EvaluationException e) {
+                    return e.GetErrorEval();
+                }
+            };
+
+            return ArrayFunction._evaluateOneArrayArg(args[0], srcRowIndex, srcColumnIndex, notInner);
+        }
     }
 }
\ No newline at end of file
diff --git a/main/SS/Formula/OperationEvaluatorFactory.cs b/main/SS/Formula/OperationEvaluatorFactory.cs
index e532f5d86..509983a23 100644
--- a/main/SS/Formula/OperationEvaluatorFactory.cs
+++ b/main/SS/Formula/OperationEvaluatorFactory.cs
@@ -116,8 +116,9 @@ namespace NPOI.SS.Formula
 
             if (result != null)
             {
-                if (result is ArrayFunction func)
+                if (result is IArrayFunction)
                 {
+                    IArrayFunction func = (IArrayFunction)result;
                     ValueEval eval = EvaluateArrayFunction(func, args, ec);
                     if (eval != null)
                     {
@@ -132,7 +133,7 @@ namespace NPOI.SS.Formula
             }
             throw new Exception("Unexpected operation ptg class (" + ptg.GetType().Name + ")");
         }
-        public static ValueEval EvaluateArrayFunction(ArrayFunction func, ValueEval[] args,
+        public static ValueEval EvaluateArrayFunction(IArrayFunction func, ValueEval[] args,
                                        OperationEvaluationContext ec)
         {
             IEvaluationSheet evalSheet = ec.GetWorkbook().GetSheet(ec.SheetIndex);
diff --git a/main/SS/Formula/UserDefinedFunction.cs b/main/SS/Formula/UserDefinedFunction.cs
index 8d1c08a4c..c64ae8bdb 100644
--- a/main/SS/Formula/UserDefinedFunction.cs
+++ b/main/SS/Formula/UserDefinedFunction.cs
@@ -41,7 +41,8 @@ namespace NPOI.SS.Formula
             int nOutGoingArgs = nIncomingArgs - 1;
             ValueEval[] outGoingArgs = new ValueEval[nOutGoingArgs];
             Array.Copy(args, 1, outGoingArgs, 0, nOutGoingArgs);
-            if (targetFunc is ArrayFunction func) {
+            if (targetFunc is IArrayFunction) {
+                IArrayFunction func = (IArrayFunction)targetFunc;
                 ValueEval eval = OperationEvaluatorFactory.EvaluateArrayFunction(func, outGoingArgs, ec);
                 if (eval != null)
                 {
diff --git a/testcases/main/SS/Formula/Functions/TestOrFunction.cs b/testcases/main/SS/Formula/Functions/TestOrFunction.cs
new file mode 100644
index 000000000..bd6addf14
--- /dev/null
+++ b/testcases/main/SS/Formula/Functions/TestOrFunction.cs
@@ -0,0 +1,153 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+namespace TestCases.SS.Formula.Functions
+{
+    using NPOI.HSSF.UserModel;
+    using NPOI.SS.Formula;
+    using NPOI.SS.Util;
+    using NUnit.Framework;
+    using NUnit.Framework.Legacy;
+    using TestCases.SS.Util;
+
+    /// <summary>
+    /// Tests for <see cref="NPOI.SS.Formula.Functions.Or" />
+    /// </summary>
+    [TestFixture]
+    public class TestOrFunction
+    {
+
+        private static  readonly OperationEvaluationContext ec = new OperationEvaluationContext(null, null, 0, 0, 0, null);
+
+        [Test]
+        public void TestMicrosoftExample0()
+        {
+            //https://support.microsoft.com/en-us/office/or-function-7d17ad14-8700-4281-b308-00b131e22af0
+            using(HSSFWorkbook wb = new HSSFWorkbook())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+                HSSFRow row = sheet.CreateRow(0) as HSSFRow;
+                HSSFCell cell = row.CreateCell(0) as HSSFCell;
+                Utils.AssertBoolean(fe, cell, "OR(TRUE,TRUE)", true);
+                Utils.AssertBoolean(fe, cell, "OR(TRUE,FALSE)", true);
+                Utils.AssertBoolean(fe, cell, "OR(1=1,2=2,3=3)", true);
+                Utils.AssertBoolean(fe, cell, "OR(1=2,2=3,3=4)", false);
+            }
+        }
+
+        [Test]
+        public void TestMicrosoftExample1()
+        {
+            //https://support.microsoft.com/en-us/office/or-function-7d17ad14-8700-4281-b308-00b131e22af0
+            using(HSSFWorkbook wb = InitWorkbook1())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFCell cell = wb.GetSheetAt(0).GetRow(0).CreateCell(100) as HSSFCell;
+                Utils.AssertBoolean(fe, cell, "OR(A2>1,A2<100)", true);
+                Utils.AssertDouble(fe, cell, "IF(OR(A2>1,A2<100),A3,\"The value is out of range\")", 100);
+                Utils.AssertString(fe, cell, "IF(OR(A2<0,A2>50),A2,\"The value is out of range\")", "The value is out of range");
+            }
+        }
+
+        [Test]
+        public void TestMicrosoftExample2()
+        {
+            //https://support.microsoft.com/en-us/office/or-function-7d17ad14-8700-4281-b308-00b131e22af0
+            using(HSSFWorkbook wb = InitWorkbook2())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFCell cell = wb.GetSheetAt(0).GetRow(13).CreateCell(3) as HSSFCell;
+                Utils.AssertDouble(fe, cell, "IF(OR(B14>=$B$4,C14>=$B$5),B14*$B$6,0)", 314);
+            }
+        }
+
+        [Test]
+        public void TestBug65915()
+        {
+            //https://bz.apache.org/bugzilla/show_bug.cgi?id=65915
+            using(HSSFWorkbook wb = new HSSFWorkbook())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+                HSSFRow row = sheet.CreateRow(0) as HSSFRow;
+                HSSFCell cell = row.CreateCell(0) as HSSFCell;
+                Utils.AssertDouble(fe, cell, "INDEX({1},1,IF(OR(FALSE,FALSE),1,1))", 1.0);
+            }
+        }
+
+        [Test]
+        public void TestBug65915ArrayFunction()
+        {
+            //https://bz.apache.org/bugzilla/show_bug.cgi?id=65915
+            using(HSSFWorkbook wb = new HSSFWorkbook())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+                HSSFRow row = sheet.CreateRow(0) as HSSFRow;
+                HSSFCell cell = row.CreateCell(0) as HSSFCell;
+                sheet.SetArrayFormula("INDEX({1},1,IF(OR(FALSE,FALSE),0,1))", new CellRangeAddress(0, 0, 0, 0));
+                fe.EvaluateAll();
+                ClassicAssert.AreEqual(1.0, cell.NumericCellValue);
+            }
+        }
+
+        [Test]
+        public void TestBug65915Array3Function()
+        {
+            //https://bz.apache.org/bugzilla/show_bug.cgi?id=65915
+            using(HSSFWorkbook wb = new HSSFWorkbook())
+            {
+                HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
+                HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+                HSSFRow row = sheet.CreateRow(0) as HSSFRow;
+                HSSFCell cell = row.CreateCell(0) as HSSFCell;
+                sheet.SetArrayFormula("INDEX({1},1,IF(OR(1=2,2=3,3=4),0,1))", new CellRangeAddress(0, 0, 0, 0));
+                fe.EvaluateAll();
+                ClassicAssert.AreEqual(1.0, cell.NumericCellValue);
+            }
+        }
+
+        private static HSSFWorkbook InitWorkbook1()
+        {
+            HSSFWorkbook wb = new HSSFWorkbook();
+            HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+            Utils.AddRow(sheet, 0, "Values");
+            Utils.AddRow(sheet, 1, 50);
+            Utils.AddRow(sheet, 2, 100);
+            return wb;
+        }
+
+        private static HSSFWorkbook InitWorkbook2()
+        {
+            HSSFWorkbook wb = new HSSFWorkbook();
+            HSSFSheet sheet = wb.CreateSheet() as HSSFSheet;
+            Utils.AddRow(sheet, 0, "Goals");
+            Utils.AddRow(sheet, 2, "Criteria", "Amount");
+            Utils.AddRow(sheet, 3, "Sales Goal", 8500);
+            Utils.AddRow(sheet, 4, "Account Goal", 5);
+            Utils.AddRow(sheet, 5, "Commission Rate", 0.02);
+            Utils.AddRow(sheet, 6, "Bonus Goal", 12500);
+            Utils.AddRow(sheet, 7, "Bonus %", 0.015);
+            Utils.AddRow(sheet, 9, "Commission Calculations");
+            Utils.AddRow(sheet, 11, "Salesperson", "Total Sales", "Accounts", "Commission", "Bonus");
+            Utils.AddRow(sheet, 12, "Millicent Shelton", 10260, 9);
+            Utils.AddRow(sheet, 13, "Miguel Ferrari", 15700, 7);
+            return wb;
+        }
+    }
+}
\ No newline at end of file