I put this spreadsheet together that will calculate the value of your faction's bonuses. It will total the amount you have spent. It will also show you how much for future upgrades and the total you have to spend to max out all the bonuses.
https://docs.google.com/spreadsheets...it?usp=sharing
Edit: Someone asked about this. The link was broken but fixed it. Did this a long time ago, but it still has some value.