Jay3's Calculator to fix Tier 2/3

For when your timer counts Tier 2/3 subs as Tier 1.

Calculate extra time

Current rules: Tier 1 = 2 min, Tier 2 = 5 min, Tier 3 = 12 min.
So each miscounted Tier 2 adds +3 min; each miscounted Tier 3 adds +10 min.