The Boxwood Company sells blankets for $35 each. The following was taken from the inventory records during May. The company had no beginning inventory on May 1. Date Blankets Units Cost May 3 Purchase 7 $15 10 Sale 4 17 Purchase 10 $17 20 Sale 5 23 Sale 3 30 Purchase 10 $18 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. a. $79 b. $130 c. $145 d. $81.