30. Widgeon Co. manufactures three products: Bales; Tales; and Wales. The selling prices are: $55; $78; and $32, respectively. The variable costs for each product are: $20; $50; and $15, respectively. Each product must go through the same processing in a machine that is limited to 2,000 hours per month. Bales take 7 hours to process, Tales take 4 hours, and Wales take 1 hour. Assuming that Widgeon Co. can sell all of the products it can make, what is the maximum contribution margin it can earn per month? A. $64,000 B. $70,000 C. $56,000 D. $34,000