(b) Bapa & Son Sdn Bhd makes two products, the Soap and the Sabun. Information relating to each of these products for April 2019 is as follows:- Opening inventory Production (units) Sales (units) Soap RM Nil 18,000 16,000 Sabun RM Nil 12,000 10,500 Sales price per unit RM12 RM10 RM RM Unit costs Direct materials Direct labour Variation production overhead Variation sales overhead 1.50 Fixed costs for the month Production costs Administration costs Sales and distribution costs 20,000 3,000 1,000 Required: (a) (b) Using marginal costing principles, calculate the profit in April 2019. (5 marks) Calculate the estimated profit if sales has been increased to 20,000 units Soap and 14,000 units Sabun. [4 marks)