(b) Zeero Co purchased an equipment for $42,000 on 1 January 2019. The equipment has been depreciated using the straight-line method. It has a useful life of 4 years, and salvage value of $2,000. The equipment was sold off for $13,000 on 1 January 2022. Required: Calculate the amount of gain or loss on disposal of equipment. (c) The following information is available for Ken Co's transactions: On January 7: Sold $53,000 of merchandise to a customer, Mr Newey on account terms 2/10, n/30. On January 11: Sold $70,000 of merchandise to a customer, Mr Roy on account terms 2/10, 1/30. On January 18, Mr Newey returned $3,000 of merchandise. On January 19, Mr Roy made a full settlement. On January 31, Mr Newey made a full settlement Required: Prepare the journal entries to record the above transactions in the month of January