Zeta Ltd. purchased inventory as follows:

• January 1: 100 units at $10 each
• February 1: 150 units at $12 each
• March 1: 200 units at $15 each

If Zeta Ltd. sold 300 units during the month of March, calculate the cost of goods sold using the LIFO (Last-In-First-Out) method.

47. Question 47: (Straight-Line Depreciation) Alpha Corporation, a manufacturing firm, recently invested in new machinery for its production line. The machinery was purchased for $200,000 on January 1, 20X1, with an estimated salvage value of $20,000 and a useful life of 10 years. Alpha Corporation prefers to use the straight-line method for depreciation.

During the first year of operation, the machinery was utilized extensively, resulting in 2,000 hours of productive use. Given this information, calculate the following:

• Annual depreciation expense for the machinery.
• Book value of the machinery at the end of the first year.
• If Alpha Corporation decides to sell the machinery after 5 years for $100,000, determine the gain or loss on the sale.

Provide detailed explanations for your calculations, considering the impact of depreciation on the company's financial statements and tax liabilities.