Accounting problem

Hi, can anyone tell me the solution of this problem..plz give me in detail

The engineer of sugar mill is entitled to a commission of 5% of the net profit, the chemist of sugar mill is also entitled to a commission of 4% of the net profit, which in each case is to be calculated after charging the commission payable to the other person but before charging one's own commission.calculate the amount of commission. net profit of sugar mill before the two commission is 5,00,000rs?

thanks