Problem: You are considering proposing to Casella Winery to lower the price of its bestselling wine by 20%. Currently they are charging $25 per bottle and are selling 10,000 bottles. The cost of making one bottle is $5. What is the percentage change in bottles sold that would ensure that the profit before and after the price change would stay the same?
A. +33.33%
B. -33.33%
C. Cannot be determined
D. +50%.