-The Table Above Gives Costs at Jan's Bike Shop

-The table above gives costs at Jan's Bike Shop. Unfortunately, Jan's record keeping has been spotty. Each worker is paid $100 a day. Labour costs are the only variable costs of production. What is the total variable cost of producing 60 bikes?

A) $200
B) $300
C) $400
D) $500
E) None of the above answers is correct.