1a) Calculate Piper Ltd.'s variable cost per unit and total fixed costs for November using the High Low method or similar. (4 marks) 1b) What is Piper Ltd.'s break-even point in units for November? (4 marks) 1c) What is Piper Ltd.'s margin of safety in units for November? (2 marks) 1d) Discuss in detail the importance of the breakeven point and margin of safety to a business. (5 marks) In January next year the following changes are predicted (Additional Information): - variable cost per unit will decrease by 10% - fixed costs will increase by 25% - profit should be 7,500 - the number of units to be sold will be 2,000 units 1e) Using your calculations in 1a) along with the additional information for January, calculate the new selling price per unit required to achieve the above (5 marks) 1f) Explain in detail the meaning and uses of contribution