那笔

that sum of money

→ 那
phrase Uncommon #12,121
that sum of money 笔 is a measure word used for sums of money and financial transactions; it usually comes before 钱.
CH: 那笔钱已经到账了。
EN: That sum of money has already arrived.

不过,我这星期不会拿那笔债去烦她。

But I won’t bother her about that debt this week.