(a) The following information relates to sales and purchases for a business.

Balances as at 1 June 2017 Sales ledger 525,000 debit 2,000 credit Purchases ledger 252,000 credit 1,200 debit Transactions in June 2017 Purchases on credit 2,300,000 Allowances and rebates from suppliers 150,000 Receipts from customers 4,000,000 Allowances to customers 80,000 Customers’ cheques dishonoured 2,000 Discounts allowed 90,000 Refunds to customers 10,000 Sales on credit 3,950,000 Discount received 50,000 Payment to creditors 2,150,000 Contra settlements 2,500 Balances as at 30 June 2017 Sales ledger 1,800 credit Purchases ledger 2,500 debit Prepare the two control accounts and derive the balances as at 30 June.