That's not the case with prepared food. The restaurant that buys from you will save a bunch on labour and utilities, so the cost of your food will not directly translated into the restaurant's food cost.If you have a 25% food cost and charge him another 25% markup then his food cost would be 50% on the items he buys from you...Lets say you have a Chicken Cordon Blue dinner for catering and sell that for $18 per person. There is no way he could resell that meal for $31.50 and make the same amount of profit in $$$$$ as you do.