Food prep is a small portion of that, you also pay people to clean the bathrooms, take orders, handle inventory and disputes, etc. Food prep on it's own is almost a rounding error.
You might be getting 30 seconds of time from people making minimum wage for a combo, but that's about it and even at 15$/hour that's well under 15 cents per order.
You might be getting 30 seconds of time from people making minimum wage for a combo, but that's about it and even at 15$/hour that's well under 15 cents per order.