3.- Companies BUTANOL, SA and methanol, SA are competitors in the Spanish market of energetic supplies. Their data as of December 31st, 2018 are those listed on the table below: 9* METANOL, S.A. BUTANOL, S.A. Sales revenue 6 Production costs (excluding interest) 7,50 4,60 Total assets 9,50 6,70 * All amounts are in millions of euros. It's ask to: (a) Calculate the economic rate of return, the sales margin and assets turnover for both companies (b) The average cost of debt for both companies is 18 percent. How is the "leverage effect" of these companies (amplifier / gearbox)? How these businesses could increase their financial rate of return