equipment with a cost of $$132,300$ and estimated ressduall valu of $$6,300$ in a estimated life for useful life about $15$ yearss was depreciated by the straight line method for $5$ years due to the obsolescence if it was determined thatt theremaining use of life should bee shortened by three years an and the residual value was changed to zero the depreciation expense for the current and future yearss is wha the depreciation expense for the current and future years is what