ECalculator The Boxwood Company sells blankets for $60 each. The following was taken from the inventory records during May. The company had no beginning inventory on May 1. Date May 3 Purchase 10 Sale 17 Purchase 20 Sale 23 Sale 30 Purchase Blankets Units Cost $20 10 $24 6. 10 $30 Assuming that the company uses the perpetual inventory system, determine the cost of goods sold for the sale of May 20 using the LIFO inventory cost method. $136 $180 $120 $144