12-10 Following is the latest income statement for Surfside Airlines: $150,000 (105,000) 45,000 Sales Variable operating costs Gross profit Fixed operating costs Net operating income Interest Earnings before taxes Taxes (40%) ( 20,000) 25,000 ( 15,000) 10,000 (4,000) Net income $ 6,000 Compute Surfside's degree of operating leverage (DOL), degree of financial leverage (DFL), and degree of total leverage (DTL)