On July 15, Piper Co. purchases RM10,000 of merchandise from supplier, Messy. RM8,000 was paid in cash and the balance will be paid on 15^th August. However, Piper Co only settled the amount owed to supplier Messy on 15^th October. The term stated , Piper Co is charged 1% per annum interest for any of its overdue amount. However, the interest charge on Piper Co overdue accounts was not paid on 15^th October. Assume Piper Co maintain perpetual inventory system

On 3^rd November , Piper Co. received RM3,000 from Bujang Engterprise for merchandise to be delivered in stages for 3 months effective month of November. The sales amount to be delivered will be RM1,000 per month. On 20^th November, Piper Co. delivered RM1,000 goods (costing RM300) to its customer, Bujang Enterprise.

Record the necessary journal entries for 15^th July, 15^th August ,15^th October, 3^rd November and 20^th November transactions.