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 $ 931,000 $ 270,000 $ 409,000 $ 252,000 Variable manufacturing and selling expenses 473,000 116,000 198,000 159,000 Contribution margin 458,000 154,000 211,000 93,000 Fixed expenses: Advertising, traceable 69,200 8,600 40,400 20,200 Depreciation of special equipment 44,300 20,700 7,900 15,700 Salaries of product-line managers 115,000 40,400 38,600 36,000 Allocated common fixed expenses* 186,200 54,000 81,800 50,400 Total fixed expenses 414,700 123,700 168,700 122,300 Net operating income (loss) $ 43,300 $ 30,300 $ 42,300 $ (29,300) *A