reckon out

verb2

1. •
   To figure out; determine by calculation, computation, or logic; make out

   • But suppose, now, that we could reckon it out, that the inmost secret of it all lay as clear and plain to us as a rule-of-three sum, should we be any the happier? — 2008
2. •
   To count out

   • Woe to those who act fraudulently, who exact their full measure when in receipt from others, yet give short measure when they reckon out or weigh out for others. — 2012