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A store purchased 100 balls from a wholesaler. Initially, they sold them for the unit cost price plus 30%. After selling 70 balls at this price, they reduced the selling price by $15 and sold the remaining 30 balls at this marked-down price. The total profit made after selling all 100 balls was $2,400. What was the original unit cost of each ball?
A. $85
B. $90
C. $95
D. $100
E. $105
A store purchased 100 balls from a wholesaler. Initially, they sold them for the unit cost price plus 30%. After selling 70 balls at this price, they reduced the selling price by $15 and sold the remaining 30 balls at this marked-down price. The total profit made after selling all 100 balls was $2,400. What was the original unit cost of each ball?
A. $85
B. $90
C. $95
D. $100
E. $105
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