Inventory & Depreciation Methods

FIFO, LIFO, weighted average, and depreciation methods, compared with the same dataset.

• Double Declining Balance: Formula and Full Depreciation Schedule

  Calculate double declining balance depreciation step by step, including the DDB rate, book value schedule, residual-value floor, and final year.

• FIFO Method: How to Calculate COGS and Ending Inventory

  Learn the FIFO method with a step-by-step inventory example that calculates cost of goods sold, ending inventory, and gross profit.

• FIFO vs. LIFO: How Each Inventory Method Changes COGS and Profit

  Compare FIFO vs LIFO with the same inventory data, then see how each method changes COGS, ending inventory, gross profit, and taxes.

• LIFO Method: How to Calculate Inventory Layer by Layer

  Learn the LIFO method with a step-by-step example for COGS and ending inventory, plus periodic versus perpetual LIFO and IFRS rules.

• Straight Line Depreciation: Formula, Schedule, and Journal Entry

  Calculate straight line depreciation with cost, residual value, and useful life, then build a schedule and record the depreciation journal entry.

• Weighted Average Cost Method: Formula and Inventory Example

  Use the weighted average cost method to calculate unit cost, COGS, and ending inventory, with periodic and perpetual examples explained.