James bought 5 boxes of cookies and 2 cakes at the store for his party. The cakes cost $4 each and his total bill was $28.50, how much was each box of cookies?

Number of cookie boxes bought by James = 5

Number of cakes bought by James = 2

Cost of each cakes = $4

Total bill paid by James = $28.50

Let us assume the cost of the each boxes of cookies = x

Then

5x + (2 * 4) = 28.50

5x + 8 = 28.50

5x = 28.50 - 8

5x = 20.50

x = 20.50/5

= 4.10

So we can see from the above deduction that the cost of each boxes of cookies bought by James is $4.10