Final answer:
Inventory valuation methods such as Specific Identification, FIFO, LIFO, and weighted-average cost impact the calculation of ending inventory and COGS in different ways, which in turn affect sales revenue and gross profit of a business.
Step-by-step explanation:
Calculating the ending inventory and cost of goods sold (COGS) involves different methodologies in inventory accounting, such as Specific Identification, FIFO, LIFO, and weighted-average cost. For Specific Identification, the ending inventory consists of the cost of unsold units specifically identified, resulting in an accurate but not always practical method. Using FIFO, the oldest inventory costs are used for COGS, leading to a different calculation. Conversely, LIFO uses the newest costs, affecting both ending inventory and COGS differently. The weighted-average cost method calculates COGS and ending inventory based on the average cost of all units available for sale during the period.
To calculate sales revenue for the month, we sum the total units sold multiplied by their respective sale prices. Gross profit is computed by subtracting COGS from sales revenue for each method. The LIFO adjustment is an accounting entry necessary when companies switch from FIFO to LIFO, reflecting changes in inventory valuation. The specifics of transactions and their impact on financial statements are critical in understanding the financial health of a business.