Found some outdated version. Sales agreement since three years before production machinery and it just continues to use the depreciation policy. Remaining useful life and salvage value unchanged.
Find some date Sales dropped considerably since three years ago and used it to produce a particular policy continues to be depreciated. The useful life and residual value remains the same.
Found that some products obsolete models, sales fell down from the 3 years ago and machinery production has just did especially still use policy to depreciate. The age of benefit balance and value remains intact.