Figure on, to

To make calculations.

1837.  I cannot understand the Secretary’s report. I figured upon its data until I threw down my slate in despair.—Mr. Wise of Virginia in the House of Representatives, Sept. 27: Cong. Globe, p. 247, App.

1909.  We always figure on supplying more lenses in July and August than in all the rest of the year, [said the optician].—N.Y. Evening Post, Jan. 7.