I have watched the lectures on payback period but here the kit the answer is directly done as not much working Look Year 1. 2. 3. 4. 5. PV. 9080. 9233. 9030. 9473 Cum NPV. 15920. 6687. 2343 Here I udstood how we got npv but how we cal the cum npv pls explain the cal of this number 15920 , 6687 and so on I udst the concept but the calculation is done directly I did like 9080 + 9233 = 18133 I didn’t get 15920 … ? Pls explain this sir