Beginning inventory, purchases, and sales for item ACC211-80 are as follows? Assuming a perpetual inventory system and using the furst-in, first-out (FFFO) method, determine a) the cost of merchandise sold on March 20, and b) the inventory on March 31 B) Beginning inventory, purchases, and sales for item ACC211-B0 are as follows: Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, determine a) the cost of merchandise sold on March 20, and b) the irventory on March 31