Markham Manufacturing Inc. purchased and later sold a machine. Details relating to the machine are below. Acquisition cost $216,000 Date of purchase 1-May-20 Date put into use 1-Aug-20 Estimated useful life in years 8 Estimated residual value $36,000 Date of disposal 1-Apr-24 Proceeds of disposal $150,000 What is the dollar amount of the entry to record transaction (f)? Enter as a positive amount. If no entry is required enter 0. (3 marks) 5 What is the balance in accounts receivable at December 31, 2020, after all transactions? (3 marks) What is the balance in the allowance for doubtful accounts at December 31, 2020, after all transactions