Hello! Im hoping to get some assistance on this problem, I feel like my answer is wrong and Im still not too certain on the math that I did to come up with my answer.

The total sales, S, of a one-product firm are given by S(L,M) = ML - L', where M is the cost of materials and L is the cost of labor. Find the maximum value of this function subject to the budget constraint shown below. M + L = 125 The maximum value of the sales is $ 1951.6 (Round to the nearest cent as needed.)