I need help to create a payback period based on these financial analysis!!

Statr ups 200,000 Implementation Cost 500,000 Product Development 20,000 Delivery & Support 400,000 Sales Cost 110,130 Operational \ Development cost 12.000 Sales & Marketing expenses 1,242,130 Total Sales Projections (SAR) Year Year 3 Year 2 550,000 Promotion Revenues 1,320,000 850,500 900,000 220,000 70,000 Subscription Revenues 620,000 Total Revenues 2,220,000 1,070,500 Income statement 3-Years Year 3 Year 2 Year 850,500 1,320,000 550,000 General Revenues 900,000 220,000 70,000 Maintenance Revenues 2.220,000 1,070,500 620,000 Total Revenues 550,00 400,000 200,000 Implementation Cost 500,000 Product Development 20,000 Delivery & Support 100,000 350,000 76,000 500,000 120,000 44,000 400,000 400,000 Sales Cost 110,130 Operational Development Cost 110,130 796,000 1,424,000 1,304,130 1,230,130 Total Cost of Goods Sold -233,630 -610,130 Gorses Profit 35,550 12,000 Sales & Marketing expenses 0 General & Administrative Expenses 12,000 Total Operating expenses 80,000 35,550 -269,180 -622,130 Operating Profit -107,672 -248852 Tax@ 40% 80,000 1,344,000 537600 806,400 -161,508 -442.130 Net income. loss Cash Flow Year 161,508422,130 Net Income/Loss Year3 Year 2 806,400 -161,508-422,130 Cash Flow from Operating activities O Cash Flow from Investing activities 806,400 0 2.500,000 Capital Invested 0 2,500,000 Cash Flow From Financing Activities 1,916,362 2,077,870 Cash the Beginning of the period 2722762 1,916,362 2,077,870 Net Cash Balance Balance Sheet Year Year 3 Year 2 2,722,762 1916,362 2,077,870 Cash 2.722,762 1,916.362 2,077,870 Total Assets 2,077,870 2,500,000 Capital 1,916,362 806,400 161,508 442,130 Net Income 2,722,762 1,916.362 2,077870 Total Liabilities & Equity