I need to solve the point B

Please, I need to solve the point B

3. A) The selling price of a Dish Wash is RO 75. The mark up is 32% on the selling price. The operating expenses are 25% of the cost. a) What is the mark up? (1 Mark) b) What is the cost of the Dish Wash? (2 Marks) c) Find the rate of mark up on cost. (1 Mark) d) Find the operating expense. (1 Mark) B) A retailer sells an article for RO 350 to the buyer and charges sales tax at a rate of 12%. If the retailer has to pay a value added tax of RO 6.600, find; a) The input tax (2 marks) b) The list price of the product the wholesaler sold to retailer (2 marks) c) The amount paid by the retailer to the wholesaler. (1 mark)