A firm wishes to distribute its total production between two manufacturing plants, A and B. A contour map of their total cost function is below, where all numbers are in 1000's. If the firm decides to produce 30,000 units at plant A, and 25,000 units at plant B, what is the approximate total cost of production? 40 43 - 49 37 - 43 30 31 - 37 It produced at Plant B (1000s) 20 24 - 31 18 - 24 10 10 20 F produced at Plant A (1000s, in 1000s a) $0,000