- If cost price is sh.90 and selling price is sh. 120 , then (i) Mark-up is 25 per cent (ii) Margin is 331/3 per cent (iii) Margin is 25 per cent (iv) Mark-up is 331/3 per cent Calculate margin and mark up Select one: (ii) and (iv) iii) and (iv) (i) and (ii) i) and (iii)