add up

verb3

1. •
   To take the sum of; to total.

   • Add up the prices and find out how much it will cost.
   • When they added up the vaccine doses from all known and anticipate sources, they didn't have enough.
2. •
   To make sense; to be reasonable or consistent.

   • His story just doesn't add up. Why would he have been at the restaurant the day before the event?
3. •
   To accumulate; to amount to.

   • If you can save even a couple of dollars per day, it will add up to a lot over a year.