Margin, turnover, return on investment, average operating assets elway company provided the following income statement for the last year: sales$1,040,000,000 less: variable expenses700,250,000 contribution margin$ 339,750,000 less: fixed expenses183,750,000 operating income$ 156,000,000 at the beginning of last year, elway had $28,300,000 in operating assets. at the end of the year, elway had $23,700,000 in operating assets.