When x increases by 1 unit, profit increases by 820-8x = 812 units
When x increases by 50 units (150 to 200) , profit increases by 820-8(50) = 420 units.
The marginal profit for a firm is given by P'(x)=820-8x. Find the increase in the total profit of the firm when the sales level increases from 150 to 200 units.
When x increases by 1 unit, profit increases by 820-8x = 812 units
When x increases by 50 units (150 to 200) , profit increases by 820-8(50) = 420 units.
