help me to do e and f. Thank you

Question 3 Masterbag Sdn Bhd (MSB) manufactured and sold 60,000 school backpacks during the year just ended at an average price of RM30 per unit. Table below illustrate annual costs, RM Selling price per unit 30.00 9.00 Variable cost per unit Manufacturing costs Marketing costs Total Variable Cost per unit 6.00 15.00 Annual fixed costs 180,000 Manufacturing Overhead Selling and administrative costs Total Fixed Costs 70,000 250,000 Work in process inventories nil Required: e) I MSB's variable manufacturing costs do increase by 10%, calculate the new selling price that MSB needs to charge to maintain the same contribution margin ratio as before. (5 marks) Briefly explain term of fixed and variable cost. Give TWO (2) examples each. (5 marks) (Total: 25 Marks)