AFMEssential reading for Paper AFM - Read the mind of an AFM marker

As for Question 1 of AFM, if I use word for theory part and excel for calculation appendix, would both be marked? Thanks.

RS Ltd is considering using a machine made by BC Ltd. The machine would cost £60,000 and at the end of a 4-year life is expected to have a resale value of £4,000, the money to be received in year 5. It would save £29,000 per year over the method that RS Ltd currently uses. RS Ltd expects to earn a DCF return of 20 per cent before tax on this type of investment. RS Ltd is currently earning good profits, but does not expect to have £60,000 available to spend on this machine over the next few years. It is subject to corporation tax at 35 per cent and receives capital allowances of 25 per cent on a reducing balance basis. Hello Sir. How does the tax allowance on WDA amount to £7500 in year 5 for this question? Because for year 2-4, am getting the tax allowance on WDA by multiplying tax allowance each year by the tax savings %