Excel Spreadsheet to calculate actual weights from baker's percentages

Hi all,

I have been reading "The Bread Baker's Apprentice" amd "Advanced Breads and Pastry".   It came to me that I could make an Excel Spreadsheet where one could input  the bread baker's percentages from a formulalong with how many of what pound loaves were desired and have it calculate the grames, pounds/ounces, and US decimal.

This would eliminat the need for yield and test info.   You could make as many as you wish and test as many as you wish.

Does anyone know if such a Excel spreadsheet exists?? ??