For example, all ingredients have an expiration date, but fresh ingredients must be used for cooking. When purchasing ingredients, “Woody” must pay great attention to the quantity of ingredients. To avoid wasting of ingredients, “Woody” needs to buy more ingredients for popular dishes, while less ingredients has to be sourced for less popular dishes. dumbChat’s customer order history feature allows “Woody” to easily estimate quantity of dishes and understand which dish is more popular among customers.