Problem 15-22A (Algo) Return on investment LO 15-6 Vernon Corporation's balance sheet indicates that the company has $670,000 invested in operating assets. During the year, Vernon earned operating income of $89,780 on $1,340,000 of sales. Required a. Compute Vernon's profit margin for the year. b. Compute Vernon's turnover for the year. c. Compute Vernon's return on investment for the year. d. Recompute Vernon's ROI under each of the following independent assumptions: (1) Sales increase from $1,340,000 to $1,608,000, thereby resulting in an increase in operating income from $89,780 to $104,520. (2) Sales remain constant, but Vernon reduces expenses, resulting in an increase in operating income from $89,780 to $92,460. (3) Vernon is able to reduce its invested capital from $670,000 to $536,000 without affecting operating income. Complete this question by entering your answers in the tabs below. Req A to C Req D Compute Vernon's profit margin, turnover and return on investment for the year. (Round "Profit margin" and "Return on investment" to 1 decimal place (i.e., 0.234 should be entered as 23.4).) a. Profit margin % b. Turnover times c. Return on investment % < Req A to C Req D >