An Investigator Traveling on Official Business in His Personal Vehicle

An investigator traveling on official business in his personal vehicle had to make emergency repairs to the vehicle. He paid $150 for the repairs plus 15% of this amount to compensate the mechanic for repair work performed overtime. The investigator's office reimbursed him $100 plus 40% of any amount over $100. Which one of the equations below represents the amount that the investigator was reimbursed for the repairs?

A) 100 + .4 [ 150 (1.15) - 100] = X
B) 4 [ (150) (.15) + 100] = X
C) 100 + (150) (.15) = X
D) 150 + .4 [ 150 (1.15) - 100] = X
E) None of these