How did they calculate the cumulative cash flow and the NPV in this problem?

Market sie 2014 Market growth rate Initiat mkt share Mkt she growth Sales price $ Manuf cost s Gross margin 5 Tax rate SG&A fixed $ SG&A expense Additional SG&A 2014 5 Discount rate 85.000 2.0% 1.00% 50% 1,000 300 700 33% 400,000 30% 400,000 70% 2016 2029 Market Flex mit she Flex mit 2014 85,000 1.09 850 2015 85,700 1.5% 1.301 BR41 2.3% 1.990 2017 90,203 3.4% 3.044 2018 92,007 5.1% 4,658 2019 93,847 7.6% 7.126 95.724 114% 10.904 2021 97,638 17.1% 2002 99,591 25.6% 25,524 2023 101.583 38.4% 39,052 16.682 Revenue SG&A PBT Tax PAT Cumulative cash flow $ $ $ $ $ 5 595,000 $ 978,500 $ (383,500) (126,555) 1256,945) (513.890) 5 910,350 $ 1.392,836 $ 2.131,038 $ 3.260,489 $ 4.988.548 $ 7,632,478 $ 11,677,691 $ 17,866,867 $ 673, 105 $ 817,851 $ 1,039,311 $ 1.378,147 $ 1,896,564 $ 2,689,743 $ 3,903,307 $ 5.760,060 $ 237 245$ 574,985 $ 1,091,727 $ 1.882.342 $ 3,091.983 $ 4,942.734 $ 7,774,384 $ 12,306,807 $ 78,291 189.745 360,270's 621.173's 1.020,354'S 1,631,102's 2,565,547' 3.995,246's 158,954 $ 385.240 S 731,457 $ 1,261,169 $ 2.071,629 S 3,311,632 S 5,208.837 $ 8.111.561 S 197 991) S 128.2955 474,512 $ 2,004,224 $ 1.814.684 5 3,054,687 54,951,892 S 7.854,616 S 27,336,307 8,600,992 18,735,415 6,182,687 12.552,728 12,295,789 NPV $530,539