Sheridan Co. has a capital structure, based on current market values, that consists of 50 percent debt, 10 percent preferred stock, and 40 percent common stock. If the returns required by investors are 9 percent, 11 percent, and 15 percent for the debt, preferred stock, and common stock, respectively, what is Sheridan’s after-tax WACC? Assume that the firm’s marginal tax rate is 40 percent. (Round final answer to 2 decimal places, e. g. 15.25%.)

Jason is looking for an engagement ring to offer his girlfriend. he has found a similar ring at each of four different jewelry stores. he doesn't have enough money to pay for the ring in cash, so he is planning on opening a line of credit (credit card) at the store he ends up buying the ring from. the chart below outlines the difference in the price of the rings the different stores offer as well as the difference in credit options. jason plans to pay off the ring purchase in 36 months. according to the information in the table, which of the jewelry stores will have the cheapest ring in the end?