On December 15, 2013, Rigsby Sales Co. sold a tract of land that cost 3600000 for 4500000. Rigsby appropriately uses the installment sale method of accounting for this transaction. Terms called for a down payment of 500000 with the balance in two equal annual installments payable on December 15, 2014, and December 15, 2015. Ignore interest charges.Rigsby has a December 31 year-end.