The Recipe app keeps track of all your recipes, ingredients, and inventory. It will allow you to save ingredients, keep track of what you have, create recipes, and generate a shopping list based on what you have and what you are missing from a recipe.
Should show the list of food that is missing for all recipes of the logged-in user (compare the list of food for all recipes with the general food list of that user).
Should count the total food items and total price of the missing food.