FormCalc lets you do calculations in any QuickBooks form where Items are used, such as Invoices, Sales Receipts, Purchase Orders, and others. It works right there in the detail area of the QuickBooks form. You don't have to leave QuickBooks or go to a different window; just press a hotkey and FormCalc goes to work, adding the calculated results to your QuickBooks form. FormCalc can give you: Calculated columns, Column totals and subtotals, Item size/color/count summaries, Total shipping weights, Automated Estimate calculations...etc. FormCalc works with all versions of QuickBooks for Windows, even older versions and non-US versions.