kercise $3$: Recipe Costing

ur operation sells a lot of cheeseburgers. Calculate the food cost given the following information:

Ground beef: $6oz$ portion $($AP$)$ purchased at $$4\mathrm{.}10$ per lb$.$

Cheese: $1\mathrm{.}5oz$ purchased at $$5\mathrm{.}25$ per lb$.$

Lettuce: $1$ leaf $($assume $20$ leaves per head$)$ purchased in a case of $24$ heads at $$27\mathrm{.}50$ per case.

Onion: $1$ slice $($onion yields $12$ slices$)$; $2\mathrm{.}5$ onions in a pound purchased at $$1\mathrm{.}74$ per lb$.$

Bun: $1$ bun in package of $18$ purchased at $$3\mathrm{.}20$ per package.

Tomato ketchup: $3oz$ average purchased in gallon container $(128oz)$ packed $4$ gal per case for $$28\mathrm{.}05.$