Solve.Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.70. The total cost to regrind 100 platens is $400. Find the linear cost function to regrind platens. If reground platens sell for $10.90 each, how many must be reground and sold to break even?
A. C(x) = 1.70x + 230; 19 platens
B. C(x) = 1.70x + 400; 44 platens
C. C(x) = 1.70x + 230; 25 platens
D. C(x) = 1.70x + 400; 32 platens
Answer: C
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