Sales Volume1,0004,0008,000Sales revenue $ 35,000 $ 140,000 $ 280,000Cost of goods sold 12,500 50,000 100,000Gross profit 22,500 90,000 180,000Operating expenses Advertising expense 650 1,400 2,400 Salaries and wages expense 20,000 26,000 34,000 Insurance expense 3,700 3,700 3,700 Postage expense 1,250 5,000 10,000 Depreciation expense 5,000 5,000 5,000Total operating expenses 30,600 41,100 55,100Operating income$ ($8,100) $ 48,900$ 124,900

Using the data above for Harris Tomes, calculate the contribution margin per photograph. ROUND YOUR ANSWER TO 2 DECIMAL PLACES . DO NOT INCLUDE A $ IN YOUR ANSWER.