Q14. Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.90. The total cost to regrind 50 platens is $400. Find the linear cost function to regrind platens. If reground platens sell for $8.80 each, how many must be reground and sold to break even?

a. C(x) = 1.90x + 305; 45 platens

b. C(x) = 1.90x + 400; 38 platens

c. C(x) = 1.90x + 400; 58 platens

d. C(x) = 1.90x + 305; 29 platens