(car sales) of the cars sold during the month of july, 87 had air conditioning, 99 had automatic transmission, and 66 had power steering. 7 cars had all three of these extras. 17 cars had none of these extras. 22 cars had only air conditioning, 64 cars had only automatic transmissions, and 27 cars had only power steering. 8 cars had both automatic transmission and power steering. how many cars had air conditioning and automatic transmission but not power steering?