Table 2 Marginal Cost Marko's Polos [dollars] 1st shirt $7 2nd shirt 10 3rd shirt I 15 4th shirt 20 12. Refer to Table 2. The table above lists the marginal cost of polo shirts by Marko's, a rm that specializes in producing men's clothing. Ifthe price ofpolo shirts decreases from $15 to $10 a] there will be a shortage of polo shirts. b] consumers will buy no polo shirts. c) producer surplus will fall from $13 to $3. d] the marginal cost of producing the third polo shirt will increase to $25