The Manager of a Gas Station Along an Interstate Highway

The manager of a gas station along an interstate highway has observed that gasoline sales generally increase each week over the summer months as more families travel by car on vacations. He also believes that sales are sensitive to fluctuations in the price of gasoline. He developed the following regression model:
Sales ($) = $59,407 + $509 (Week) + 16,463 (Price/gallon)
-The sales forecast for the 11^th week of the summer if the price per gallon is estimated to be $3.00 is:

A) less than or equal to 15,000.
B) more than 15,000 but less than or equal to 15,500.
C) more than 15,500 but less than or equal to 16,000.
D) more than 16,000 but less than or equal to 16,500.