The following assumptions are given: - Return on sales: 5% - Turnover: € 120 mln. - Invested capital: € 80 mln. a) Apply the Du Pont formula to calculate the return on investment (Rol). b) Calculate the turnover of the invested capital. c) By which measures can the Rol improved to 10 %? Du Pont formula: Rol = --- profit ‒‒‒‒‒‒‒‒‒‒‒‒‒‒ X turnover turnover invested capital x 100