Castle TV, Inc. purchased 1,600 monitors on January 5 at a per-unit cost of $140, and another 1,600 units on January 31 at a per-unit cost of $254. In the period from February 1 through year-end, the company sold 3,000 units of this product. At year-end, 200 units remained in inventory. 4. Required information Assume that Castle TV, Inc. uses the FIFO flow assumption. The cost of the 200 units in inventory at year-end is: $39,400. $50,800. $28,000. $78,800. 5. Required information Assume that the replacement cost of this monitor at year-end is $234 per unit. Using LIFO flow assumption and the lower-of-cost-or-market rule, the ending inventory amounts to: $50,800. $78,800. $28,000. $46,800.