diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
index 274bcf9..4c33e64 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
@@ -242,7 +242,10 @@
             // if criteria is a number, straight comparison
             if (criteria is double)
             {
-                return (double) value == (double) criteria;
+                if (value is Double)
+                    return (double) value == (double) criteria;
+                Double dValue;
+                return Double.TryParse(value.ToString(), out dValue) && dValue == (double) criteria;
             }
 
             // convert criteria to string
diff --git a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
index f28b5dd..5ba9ef8 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
@@ -15,14 +15,12 @@
     {
         private static void Main(string[] args)
         {
-            var wb = new XLWorkbook();
-            var ws = wb.AddWorksheet("Sheet");
-            ws.FirstCell().SetValue(1)
-                .CellBelow().SetFormulaA1("IF(A1>0,Yes,No)") // Invalid
-                .CellBelow().SetFormulaA1("IF(A1>0,\"Yes\",\"No\")") // OK
-                .CellBelow().SetFormulaA1("IF(A1>0,TRUE,FALSE)"); // OK
-            wb.SaveAs(@"c:\temp\saved.xlsx");
+            var wb = new XLWorkbook(@"c:\temp\sopos.xlsx");
+            var ws = wb.Worksheet("3");
+            Console.WriteLine(ws.Cell("E22").Value);
+            //wb.SaveAs(@"c:\temp\saved.xlsx");
             Console.WriteLine("Done");
+            Console.ReadKey();
         }
     }
 }