Solve the problem.Regrind, Inc. regrinds used typewriter platens. The cost per platen is $2.90. The fixed cost to run the grinding machine is $308 per day. If the company sells the reground platens for $6.90, how many must be reground daily to break even?
A. 51 platens
B. 77 platens
C. 106 platens
D. 31 platens
Answer: B
Mathematics
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A. 
+ 
B. 
+ 
C. 
+ 
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+ 
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