Excel 2007 : UserForms

Hi,

My company is new and dont have a customized software to complete tasks. We use excel for accounting/invoicing. Each time we have to manually enter the fields. My friend told me that we can take advantage of excel/word userform features that will improve efficiency. The task is I want an excel file which will ask questions on opening (date, item, unit price, qty) and on completing the form it will post all entries in the table accordingly. Attached is the file for your convenience.

Thanks in advance.