Suppose a consumer has $100 to spend on two goods, shoes and shirts. If the price of a pair of shoes is $20 per pair and the price of a shirt is $15 each, which of the following combinations is unaffordable to the consumer?
◦ 5 pairs of shoes and 0 shirts
◦ 2 pairs of shoes and 4 shirts
◦ 0 pairs of shoes and 7 shirts
◦ 2 pairs of shoes and 3 shirts
◦ 0 pairs of shoes and 0 shirts