Evan washes two types of vehicles it takes him 30 minutes to wash a car and 40 minutes to wash a truck he charges $12 to wash a car in 15 to wash a truck and 270 minutes evan makes $150 washing cars and trucks how many trucks did evan wash

There is no way that the amount of cars and trucks can evenly fit into the 270 minutes and $150. 
The closet i got was 
A) 6 trucks and 4 cars for $150 and 390 minutes
B) 2 trucks and 10 cars for $150 and 380 minutes 
C) 3 trucks and 5 cars for $105 and 270 minutes.