The following account titles and balances were taken from the adjusted trial balance of Omar Farm Co. for 2013. The company uses the periodic inventory system.
Account Title Balance
Sales returns and allowances ........... $ 6,500
Miscellaneous expense .............. 800
Transportation-out ............... 1,400
Sales ...................... 139,500
Advertising expense ................ 5,500
Salaries expense ................ 17,000
Transportation-in ................. 3,450
Purchases .................... 84,000
Interest expense ................. 720
Merchandise inventory, January 1 .......... 12,400
Rent expense ................... 10,000
Merchandise inventory, December 31 ......... 8,100
Purchase returns and allowances ........... 2,500
Loss on sale of land ............... 6,800
Utilities expense ................. 1,420

Required
a. Prepare a schedule to determine the amount of cost of goods sold.
b. Prepare a multistep income statement.
c. Prepare a single-step income statement.