Slide 9-16 Depreciation Book Value e Cost-Accumulated Depreciation > Accumulated Depreciation Contra-asset Represents the portion of an asset fa cost that has already been allocated to expense >Causes of Depreciation ● Physical deterioration ● Obsolescence Irwin/McGraw-Hill ?The McGraw-Hill Companies, Inc., 1999?The McGraw-Hill Companies, Inc., 1999 Slide 9-16 Irwin/McGraw-Hill Book Value  Cost - Accumulated Depreciation Accumulated Depreciation  Contra-asset  Represents the portion of an asset 抯 cost that has already been allocated to expense. Causes of Depreciation  Physical deterioration  Obsolescence Depreciation