I recently went to a tech conference where an app could scan receipts. If you have a catalogue of all items in the retail store, you could pull that data via taking a picture of the app. Could that be applied here?
Kerrin McLaughlin To solve the challenge of removal, maybe an idea could be to suggest recipes based on the food items by matching against existing online recipes. You could develop the UI such that the consumer can add how many people (adults + kids) they are cooking for, and the app would subtract appropriate proportions from the total supply. This way, removal of products is taken care of. e.g. If someone bought 400g of pasta, and as per online recipe, used it to create 2 meals for 4 ppl (assuming 50g each serving size), then no more pasta left :)