SECTION D (Answer one question from this section) QUESTION8 The net present value method of investment appraisal is often considered to be the best method of investment appraisal. Compare and contrast the main advantages and disadvantages of the net present value method over the advantages and disadvantages of other methods such as payback period and accounting rate of return. (20 marks) QUESTION9 Outline the main features of the marginal (i.e. variable) costing and full (absorption) costing methods. What are the key differences between these two costing methods, in terms of their areas of application? Use examples to illustrate these differences. (20 marks)