Step 2: Calculate marginal utility and marginal utility per dollar for concession stand items. Quantity of Concession Total Marginal Average I tem Marginal Utility Stand Items Utility Utility Price Per Dollar for Consumed Concession Items 400 200 200 $15.00 13.33 800 375 175 $15.00 11.66 1,200 525 150 $15.00 10 1,600 650 125 $15.00 8.33 2,000 750 100 $15.00 6.67 2,400 825 75 $15.00 5 2,800 875 50 $15.00 3.33