Cash flow spreadsheet needs correct formula calculations

Hello, I have a sample cash flow spreadsheet that I need to fill with specific parameters. The goal is to create a formula that will calculate my break even point for my subscription service business. As a result I have a box in row 62-70 that needs to calculate the changes based on this information: Subscription fee: $20* (per member) How many members I expect in 3 months: 100* | 100%(show as whole # and % member increase from month 0-3) How many members I expect in 6 months: 110 | 10% (show as whole # and % member increase from month 3-6) How many members I expect in 9 months: (show as whole # and % member increase from month 6-9) How many members I expect in 12 months: (show as whole # and % member increase from month 9-12) Month-to-month Increase in Revenue: The whole point is, I want to be able to forecast how many members I will need to (1) generate revenue and (b) break-even or go positive (when will it occur?). The assumption is that I burrowed two loans and need to pay them back (see row 10 + 41). The spreadsheet is based on a 2-year period.