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. Blankets Units Cost Date May 31 Purchase 5 $20 10 Sale 3 17 Purchase 10 $24 20 Sale 6 23 Sale 3 30 Purchase 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 FIFO inventory cost method. Oa. $120 Ob. $144) Oc. $136 Od. $180