At May 1, 2017, Sheffield Corp. had beginning inventory consisting of 320 units with a unit cost of $7.0. During May, the company purchased inventory as follows: 640 units at $7.0 950 units at $8.0 The company sold 1590 units during the month for $13.0 per unit. Sheffield Corp. uses the average cost method. Sheffield Corp.'s gross profit for the month of May is