P=MR+$750

TC =2,500,000+500q+0.005Q^2 (squared)
Mc =500+0.01Q

Calculate profit maximizing level
Calculate the company's optimal profit and optimal profit as a percentage of sales revenue

Can anyone help here I am lost

MR=MC

750=500+0.01Q
250=0.01Q
250/0.01
Q=25,000