figure up
To add or total something. A noun or pronoun can be used between "figure" and "up." Do you mind figuring up the total for us?
figure something up
to add up the amount of something. Please figure the bill up. We have to go now. I will figure up the bill right away.
figure up
Calculate, total, as in Please figure up just how many feet of lumber we need. [Late 1800s]
figure up
v. To calculate something, especially by addition: That's all of the supplies we need; can you figure up the total for us? We figured up the bill incorrectly; everyone owes another $10.