Periodic and Perpetual Systems - Calculating Ending Inventory and Cost of Sales using Average Cost, Moving Average, FIFO, LIFO, and Dollar-Value LIFO The inventory records of Mod Oil Company for January 2020 showed the following data for an item of its merchandise for sale (assume that the six transactions occurred in the order shown). Units Unit Cost 900 $6.00 6.10 Total $5,400 6,588 1,080 Date Beginning inventory (Jan. 1) Jan. 3 Purchases Jan. 5 Sales (1,620 units) Jan. 10 Purchases Jan. 20 Sales (900 units) Jan. 25 Purchases Jan. 28 Sales (540 units) Total available for sale 1,080 6.20 6,696 720 6.30 4,536 3,780 $23,220 Its ending inventory of 720 units can be specifically identified as follows: 180 units from the January 3 purchase, 90 units from the January 10 purchase, and 450 units from the January 25 purchase. Compute ending inventory and cost of goods sold for the month ended January 31 using the methods indicated below. Round your final answer to the nearest whole dollar. Do not round per unit costs in your calculations. COGS $ Periodic Inventory System Ending Inventory a. Specific identification (periodic) $ b. Average cost (periodic) C. FIFO (periodic) d. LIFO (periodic) e. Moving average (perpetual) f. FIFO (perpetual) g. LIFO (perpetual) h. Dollar-value LIFO* *Assume that the beginning inventory is the base layer at a cost of $6.00 per unit. The price index for January 2020 is 1.05