the profit of a cell phone manufacturer is found by the function y=-2x^2+108x+75, where x is the price of a cell phone. What will the maximum profit be

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425

Answer is a not really sure tho