A group has chartered a bus to Atlanta. The driver costs $200, the bus costs $500, and parking in Atlanta will be $90. You have already paid $700 to reserve the bus and a driver. The driver's fee is non-refundable, but the bus may be canceled a week in advance at a charge of $75. At $20 per ticket, at least how many people must buy tickets so that the trip need not be canceled? A. 10 B. 14 C.26 D.40