please complete this accounting question for me, also including mathematucal steps and well explanation would be the best, i will upvote for clear and correct answer!

QUESTION 8 A equipment with a cost of $14,000 was disposed during the year with accumulated depreciation of $7000 and gain on disposal of $3,000. No other disposal or retirement of Equipment during the year ended 31 December 2020. The total depreiciation expense for year ended 31 December 2020 is $ Additions of Equipment (Purchase of Equipment) for the year ended 31 December 2020 is \$ Sales Proceeds on disposal of equipment is \$ ** your answers should include numerals only, no dollar sign ("s") no comma ", , eg five thousand dollars should be input as so00, otherwise, no marks will be awarde