I own a restaurant and need to update my excel spread sheet for working out gross profit for my menu items. I have a work sheet that I was given by another business and I have filled in the basic items, but don't know how to update the calculations to make it work!!! I have the ingredients list, with the recipe lists and menu lists, but I can't get it all to calculate. I have never used xl and I need a new up to date work sheet that I can update with new items etc going forward.