ABC Inc. uses the LIFO method for inventory costing. For the year ended December 31, 2023, the following information is provided:

• Beginning Inventory: 1,800 units at $25 per unit
• Purchases:
  • March 1: 2,500 units at $28 per unit
  • July 1: 3,200 units at $30 per unit

• Sales:
  • 6,000 units sold during the year

• Ending Inventory: 1,500 units

a. Calculate the cost of goods sold (COGS) using the LIFO method. b. Determine the value of ending inventory using the LIFO method. c. Compare the financial performance of ABC Inc. under LIFO with what it would be under FIFO. d. Discuss how varying sales volumes throughout the year affect the COGS calculation under LIFO. e. Analyze the impact of changing inventory costs on ABC Inc.'s profitability ratios. f. Evaluate the operational advantages and disadvantages of using LIFO in a dynamic sales environment.