I play a game that gives a production bonus for having certain percentages more than the required "culture". The picture here shows the different percentages available, the requirement for the current level, etc. What I would like to have is a set of formulas that will calculate the "available culture" needed for the other levels based on the known requirements. For instance from the picture, I would want to be able to calculate the 100%, 125%, and 170%. The picture already give the amounts needed for the 160% being "Available Culture + Neighborly Help Bonus + Required for next level. So if I wanted to have enough Available Culture for the 160% in this case I would need a total of 260K. However, what I really want is to know what the available could drop to and still be at 125%. The Neighborly Help Bonus varies from day to day and sometimes hour to hour so I like to ensure I have at least a 125% base. I hope this makes sense.