The Economy Repair Shop charges a $50 fee plus $30 an hour for labor. Jeff's Repair Shop charges $35 an hour. Which inequality can be used to determine the number of hours of labor that would make Economy Repair Shop's charges less than Jeff's Repair Shop's charges?
A. 50+30x<35x
B. 50+30x>35x
C.50x+30<35x
D.50x-30<35x
