Zimmer company owns an executive plane that originally cost $$2,560,000.$ It has recorded straight line depreciation on the plane for seven full years calculated assuming a $$320,000$ expected salvage value at the end of its estimated $10$ year useful life Zimmer disposes of the plane at the end of the seventh year.

A: at the disposal date, what is the cumulative depreciation expense and netbook value of the plane?

B: how much gain or losses reported at disposal of the sales price is: see chart