Richard Klein works as an auto mechanic and earns the following commission rates: 3.00 percent for oil changes, 5.00 percent for tune-ups, and 6.25 percent on auto parts sales. He is guaranteed a minimum salary of $2,450.00 per month. Last month he brought in $2,500.00 in oil changes, $4,500.00 in tune-ups, and sold $28,200.00 in parts. What is his gross pay for the month?