Boscan Corporation purchased machinery on January $1,2024,$ at a cost $$85,000.$ The estimated useful life of the machinery is $5$ years, with an estimated residual value at the end of that period of

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$\backslash$table$[[$Year$,$Calculation,$\backslash$table$[[$Depreciation$],[$Expense$]],\backslash$table$[[$Accumulated$],[$Depreciation$]],$Book Value$],[1,(85,000-10,000)20\%,15,000,15,000,85,000-15,000=70,00$