Number of Hours worked

Gurus

I am working on cats for public sector. I have a situation where a employee can get paid for more 24 hours per day

i.e, he can take 8 hrs paid off and worh 16 hrs overtime

I need to find out the number of hours he worked on a particular day.

does catsdb stores that value or have to calculate it

any help would be appriciated

Thanks in advance