A firm that manufactures speciality bicycles has a profit function

π = 5x^2 − 10xy + 3y^2 + 240x

where x denotes the number of frames and y denotes the number of wheels. Find the maximum profit

assuming that the firm does not want any spare frames or wheels left over at the end of the produc-

tion run.

PLEASE HELP ME TO SOLVE THIS EXCERSISE