Removed the Invoice Net Amount Extended Retail column from the Invoice table DataGridViews. Fixed a crash bug on the main form caused by an empty department sales variable. Small refactoring on the main form's calculation methods.

AdvertsingProfitControl/DebugDatabaseConverter.cs

@@ -69,6 +69,7 @@ namespace AdvertsingProfitControl
                     }
                 }
             }
+
         }
 
         private void MoveOverButton_Click(object sender, EventArgs e)
@@ -776,5 +777,23 @@ namespace AdvertsingProfitControl
 
             return dataTable;
         }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            var db = new AdvertisingProfitControlModel();
+            using (var scope = new TransactionScope())
+            {
+                var invoices = db.Invoices.Select(x => x);
+                foreach (var invoice in invoices)
+                {
+                    invoice.InvoiceNetAmountAtCost = invoice.InvoiceNetAmount;
+                    invoice.InvoiceNetAmount = null;
+
+                }
+                db.SaveChanges(); 
+                scope.Complete();
+            }
+
+        }
     }
 }