Kristen Montana operates a retail clothing operation. She purchases all merchandise inventory on credit and uses a periodic inventory system. The accounts payable account is used for recording inventory purchases only; all other current liabilities are accrued in separate accounts. You are provided with the following selected information for the fiscal years 2005, 2006, 2007, and 2008. 2005 2006 2007 2008 Inventory (ending) $13,000 $11,300 $14,700 $12,200 Accounts payable (ending) 20,000 Sales 225,700 227,600 219,500 Purchase of merchandise inventory on account 146,000 145,000 129,000 Cash payments to suppliers 135,000 161,000 127,000 Calculate cost of goods sold for each of the 2006, 2007, and 2008 fiscal years. Calculate the gross profit for each of the 2006, 2007, and 2008 fiscal years. Calculate the ending balance of accounts payable for each of the 2006, 2007, and 2008 fiscal years