Excel pricing sheet

My metal distribution company needs a solution it's present programs can't provide. We are looking for an Excel expert to develop a spreadsheet that will calculate a price when a number of variables (alloy, size, quantity, etc.) are input or selected from drop down menus. We need the ability to input daily commodity prices and currency exchange rates that would influence these calculations. Involves approx. 2000 items with multiple quantity levels (10) and multiple pricing levels (2-3). User friendly interface required to allow high speed input for sales staff. Looking forward to your responses. This is our first time posting. We are a succesful company, but not very tech savvy. Please explain you relevant capability in detail. Payment is prompt and vendor references are available. Thank you.