Splish Company constructed a building at a cost of $\backslash (\backslash$$ $2,728,000\backslash )$ and occupied it beginning in January $2006.$ It was estimated at that time that its life would be $40$ years, with no salvage value. In January $2026,$ a new roof was installed at a cost of $\backslash (\backslash$$ $372,000\backslash ),$ and it was estimated then that the building would have a useful life of $25$ years from that date. The cost of the old roof was $\backslash (\backslash$$ $198,400\backslash ).($a$)$ What amount of depreciation should have been charged annually from the years $2006$ to $2025?($Assume straight$-$line depreciation.$)$