The Canliss Milling Company purchased machinery on January 2,2019 , for $850,000. A five-year life was estimated and no residual value was anticipated. Canliss decided to use the straight-line depreciation method and recorded $170,000 in depreciation in 2019 and 2020. Early in 2021, the company changed its depreciation method to the sum-of-the-years'-digits (SYD) method. Required: 1. Will Canliss apply the SYD method retrospectively or apply the method prospectively? 2. Prepare any 2021 journal entry related to the change. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)