Answer:
A. Supplier X offers the better deal by $3.93.
Explanation:
Supplier X offers a mechanic a part at 35% off the retail price of $65.40.
Supplier X's price is $42.51.
Supplier Y offers him the same part at 20% over the wholesale cost of $38.70.
We calculate the difference in the prices below:
Supplier X offers the better deal by $3.93.