Solve the problem.Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.60. The total cost to regrind 80 platens is $600. Find the linear cost function to regrind platens. If reground platens sell for $10.40 each, how many must be reground and sold to break even?
A. C(x) = 1.60x + 600; 69 platens
B. C(x) = 1.60x + 472; 54 platens
C. C(x) = 1.60x + 600; 50 platens
D. C(x) = 1.60x + 472; 40 platens
Answer: B
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