The owner of a hobby store bought a case of 9-volt batteries for $24.00. He marked the price up such that his profit was $1.76 per battery. After selling 12 batteries, the store owner had recovered his cost. How many 9-volt batteries are in a case?
A) 100 batteries
B) 110 batteries
C) 105 batteries
D) 95 batteries

Question

Quizplus · Accepted Answer

The store owner made a profit of $1.76 per battery, so the selling price of each battery was $24.00 + (12 x $1.76) = $40.32. Since the store owner recovered his cost after selling 12 batteries, the cost of each battery was $40.32 / 12 = $3.36. Therefore, the case contained 9-volt batteries = $24.00 / $3.36 = 100 batteries.

The Owner of a Hobby Store Bought a Case of 9-Volt