This document discusses calculating and recording depreciation adjustments. It explains how to calculate annual depreciation expense using the straight-line method by subtracting estimated salvage value from original cost and dividing the difference by estimated useful life. Accumulated depreciation is calculated by adding the current year's depreciation expense to the previous year's accumulated depreciation. Book value is determined by subtracting accumulated depreciation from original cost. The document also outlines the steps to analyze and record depreciation adjustments.