My boss wants me to create a spreadsheet that shows inventory sold and what the percentage of each size sold. He also wants the inventory on hand for those same items and what percentage of size's we have. He needs this so he can decide what to buy on the next purchase order to keep the percentages correct. Is there any way to make a spreadsheet using this info that can automatically forecast what needs to be bought to keep the percent of inventory in line with the percent of sales by size? I hope that I have worded this correctly but if not let me know and I can provide additional info. Thank you