Suppose a gardener produces both tomatoes and squash in his garden. If he must give 8 bushels of squash to get 5 bushels of tomatoes, then his opportunity cost of 1 bushel of tomatoes is a) 0.62 bushels of squash b) 1.6 bushels of squash c) 3 bushels of squash d.) 5 bushels of squash 20.