NPV (Section B)

Hello. Here is the question I'm struggling with: ??????????????????????????????????? Mukund Co is an all equity financed company that is considering a new project. Its beta factor is 1.2 but the project has 25% more business risk. The cashflows of the project, all in $s, including the scrap value at time 5, are as follows: Cashflow (200,000) 28,000 35,000 42,000 90,000 120,000 Timing ------- 0 ---------- 1 -------- 2 --------- 3 --------- 4 --------- 5 The risk free rate is 6% and the return of the market is 14%. Tax at 30% has been taken into an Islamic country, and wishes to know what is allowable under Islamic finance. ***Calculate the net present value of the project at a cost of capital of 20%. ?????????????????????????????????? I thought the answer could simply come out from multiplying CF by the discount factor of 20% (Yr.1 28k x 0.833) + (Yr.2 35k x 0.694) + (Yr.3 42k x 0.579) + (Yr.4 90k x 0.482) + (Yr.5 120k x 0.402) which would be ($36448). But when I checked the answer, the Yr. 2's CF was 75k and Yr.3's CF was 90k instead, and the answer was $20262. Would you please explain me through about this problem? Thank you. Yujin