The agency need it sales increase by 20 percent if its wants to recoup the income lost by lowering the prices.
In practice, these agency operate by purchasing number of fleet vehicles and renting them to customers for a charge which are influenced by car type, number of days, usage type etc.
Hence, since the agency wants to recoup the income lost by lowering the prices and have total revenues be at least as high as before, them they needs its sale level to increase by at least 20%.
Therefore, the Option B is correct.
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