As a public accountant, you have been contacted by Joe Davison, CEO of Sports-Pro Athletics, Inc., a manufacturer of a variety of athletic equipment. He has asked you how to account for the following changes.
1. Sports-Pro appropriately changed its depreciation method for its production machinery from the double-declining-balance method to the production method effective January 1, 2010.
2. Effective January 1, 2010, Sports-Pro appropriately changed the residual values used in computing depreciation for its office equipment.

Instructions
Write a 1–1.5 page letter to Joe Davison, explaining how each of the above changes should be presented in the December 31, 2010, financial statements.