Excel Spreadsheet Project

Hi, We are Ebay sellers and want an Excel spreadsheet done (Excel 2003 compatible) so we can quickly work out some calculations approx 18 fields and around 15 simple calculations. We also need to change certain fields from a simple dropdown menu eg select different percentages. I have explained what we need below and have also given 3 working examples. Requirements: Profit at different price points Calculate GST a 10% calculation (tax our nett postion) would need with and without GST Tax liability at different tax rates Ability to enter the product name with the calculations preferably across the page or in a small table We need to be able to save the details (would like as many products per page as possible) preferably taking up 2-3 lines Ability to print the results Would be dynamic ??" ie change one figure and the whole calculation updates to reflect the change Willing to pay extra if we have forgotten anything and extra work need to be done Please see attached file for all details