The following information is available for the year ended 31 December 20X8 for Ski, a well-run company: Opening cash 1,000 Closing cash 2,000 Opening balance on the payables ledger control account 8,000 Closing balance on the payables ledger control account 10,000 Opening balance on the receivables ledger control account 12,000 Closing balance on the receivables ledger control account 14,000 Cash paid to trade accounts payable in the period 9,000 Opening inventory 6,000 Closing inventory 7,000 Mark-up of 10% is applied to arrive at sales price. Assuming the information above is complete, what was the sales figure for the period? A. $13,200 B. $11,000 C. $9,900 D. $6,600