The Regal Cycle Company manufactures three types of bicyclesa dirt bike, a mountain bike, and a racing bike. Data on sales and expenses for the past quarter follow: Total Dirt Bikes Mountain Bikes Racing Bikes Sales $ 918,000 $ 262,000 $ 401,000 $ 255,000 Variable manufacturing and selling expenses 480,000 113,000 208,000 159,000 Contribution margin 438,000 149,000 193,000 96,000 Fixed expenses: Advertising, traceable 69,100 8,300 40,600 20,200 Depreciation of special equipment 44,300 20,500 7,900 15,900 Salaries of product-line managers 115,000 40,900 38,200 35,900 Allocated common fixed expenses* 183,600 52,400 80,200 51,000 Total fixed expenses 412,000 122,100 166,900 123,000 Net operating income (loss) $ 26,000 $ 26,900 $ 26,100 $ (27,000)