The table below Contains information about the production and costs of a firm. The price faced by the rm in a pertectly competitive market is $60 per unit. The marginal cost of producing the 7th unit of output is? [Rounded off to the absolute value.) Select one: Q a. 526 O b. 520 C) c. 540 Q d. 531 C) a. 535 O f. 560 G 9. $43 0 h. 522 O i. 533