Answer: $200
Explanation: In the given case, the employer should provide bonus in such a way that the extra cost of $60 incurred gets covered, otherwise, it will result as a loss and wastage of efforts. Now, the coverage amount from given options can be explained as follows :-
A. coverage = (60% * $60) - 60 = -$24 loss
B. coverage = (60% * 120) - 60 = $12
C. coverage = (60% * 200) - 60 = $60
D. coverage = (60% * 300) - 60 = $120
Thus, option C is correct as in case of option D the coverage amount is exceeding extra cost.