This video covers a feature used by restaurants, as well as butchers and locations that need to build costs for items that they sell. If an item you sell, is comprised of several items that you buy, this is a great option for you.
As you can see the cost controls of this feature allow you track the usage of your underlying items, track their inventory and stop doing all the guess work. Know for sure, and know how to ensure your products are properly managed, there is no theft or waste that has gone unaccounted for.
We suggest you dedicate an hour or more of your time time on your schedule to list out the items you purchase into excel, then import all the products into the POS. This way you can have anyone work on getting your list of items together, make a column for the name, the cost the count, the vendor and the category. You can then spend the time after that making the recipes for groups of items, or for individual items. This will not affect your business on the sales side, it help your analysis however once you get your recipes input.