In December ABC sold 11,000 units at a price of $8 each. Direct material and direct labor were $2 and $1 per unit respectively. Variable selling costs were 50c per unit, and fixed selling costs were $2,000. Average variable manufacturing overhead was given as $1.25, and average fixed manufacturing overhead has given as $2.25 (based on a volume of 10,000 units). Prepare a contribution income statement