Sandra Corp. sells one product and uses a perpetual inventory system. The beginning imventory consisted of 78 units that cost $19 per unit. During the current month, the company purchased 476 units at $20 each. Sates during the month totated 358 units for $45 each. What is the number of units in the ending inventory? 554 units. 196 units. 78 units. 118 units