Consider a firm with a production function:
Q(L,K) = 400 + 12.3L - 0.8L^2 + 10.1K - 0.3K^2 + 0.2LK,
Where a firm employs K units of capital and L units of labour. Q describes the output which the firm can produce with these inputs. Assume that the firm is a price taker in the product market and in both factor markets. If P = 10 is the price of the commodity produced, r = 1 the interest rate and w = 3 the wage rate, then find maximum profit ̠́(L, K) of this firm.
Hint. The maximum profit ̠́(L, K) of the firm with P - price of the commodity produced, r - the interest rate and w - the wage rate
̠́(L, K) = P · Q(L, K) - rK - wL