At Costco, a case of 12 boxes of macaroni and cheese costs $18.00. How much is each box of macaroni

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At Costco, a case of 12 boxes of macaroni and cheese costs $18.00. How much is each box of macaroni and cheese worth?

Cost per box = Total price / number of boxes
Cost per box = $18/12
Cost per box = $1.50