sum to

Doing one's sum to-morrow instead of to-day doesn't make the sum easier, but at least makes to-day so.

Here, my good fellow, is a purse, containing fifty guineas—I will double the sum to-morrow.

Do the sum to-night, and bring me the answer in the morning.

His salary was a trifle over £288—worth about five times that sum to-day.

No matter how urgent a situation might have been, he would still have preferred to pay a sum to-morrow rather than to-day.