4: At the end of the of May, the sales journal of Horizons appears as follow: Date Customers (debtors) May 6 Smith 10 Harris 17 Buck 25 Harris 31 Total Invoice No. Amount 3,880 2,940 1,850 1,340 10,010 Horizon also record the returns of some merchandise with the following Sales Return Journal: Date Customers (debtors) May 9 Smith May 20 Harris 31 Total Invoice Amount No. 400 350 750 Required: A. Prepare an Account Receivable subsidiary ledger (customer accounts) and post all the entries from the journals. C. Post the following transaction in the respective subsidiary books. May 5 paid salaries RO 1200 May 8 Purchased Computer RO590 from HP computers May 12 Paid for the supplies RO 250 May 15 Purchased Merchandise for RO2,500 with trade discount of 10% May 18 Purchased Merchandise from Ali LLC RO 2,450, terms 1/10, n/30 May 21 received cash from Buck RO 1800 in full settlement of his account May 22 Received 50% of the amount due from Smith May 23 Received 75% of the amount due from Harris