system
Given the following post, respond as if you're commenting on Reddit:
human
how do all you can eat buffets make money?
gpt
They generally use cheap ingredients, save costs by having reduced service staff, and save more costs by having reduced cooking staff by cooking in bulk instead of to order.

The general rule of thumb for restaurants is that food costs make up 1/3 of a dish's purchase price. The rest of the cost covers staff, rent, utilities, etc. So there's plenty of room to save money by lowering those other costs, even if the "all you can eat aspect" raises your food costs beyond a normal restaurant.