Apples are sold in bags of four that cost $5, or bags of six that coast $7 per bag. what is the smallest cost at which you can buy 74 apples?

Divide 74 into 4 and 6

74/4 = 18,5

74/6=12,33

so if you buy in bags of 4 you need 19 bags, which costs 5 x 19 = $95

if you buy in bags of 6 you need 13 bags, which costs 7 x 13 = $91

Buying in bags of 6 costs less.