A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
You could try Excel's Data Form. Say you have the column Headings
Date, PO#, Item, Description, Qty, Price, Cost
Price is a calculated field and the column Headings are bold; choose Data, Form. Excel launches a simple form that can be used to enter, delete and search for records. Each record is added to the data sheet when you click OK. Calculated fields are greyed out in the form but the formula is entered in the worksheet with the rest of the data.
The only problem is that you have to reenter the Data, and date for each item on the order.
If you want the form actually in the worksheet you have to create a macro to copy each line of data into PO Record sheet. The advantage is that you can use lookup formulas to to get the Item description and only the numerical data needs to be copying. In this way, Excel behaves more like a database.
If this is what you need I'll send you one I did ages ago.
peter_atherton AT hotmail.com
Regards
Peter