Updated!
Once you add the extra 7 TPE from before regression, your new TPE total before regression was 1116. So your regression amount would actually be 1116 * 0.2 = 223.2 = 223 TPE. So you need to regress 2 more TPE. You already regressed 1 TPE away from the 21 you earned this week so I took 1 more TPE away from your banked TPE. So after this update you now have 907 TPE with 7 TPE banked.
Once you add the extra 7 TPE from before regression, your new TPE total before regression was 1116. So your regression amount would actually be 1116 * 0.2 = 223.2 = 223 TPE. So you need to regress 2 more TPE. You already regressed 1 TPE away from the 21 you earned this week so I took 1 more TPE away from your banked TPE. So after this update you now have 907 TPE with 7 TPE banked.