Current Attempt in Progress Cheyenne Co. purchased equipment for $523,000 which was estimated to have a useful life of 10 years with a salvage value of $8,600 at the end of that time. Depreciation has been entered for 7 years on a straight-line basis, In 2021 , it is determined that the total estimated life should be 15 years with a salvage value of $5,600 at the end of that time. (a) Prepare the entry (if any) to correct the prior years depreciation. (b) Prepare the entry to record depreciation for 2021. No. Account Titles and Explanation Debit Credit (a) (b)