Following budget.

Following budget.

Hi guys
For my ZOHO project, I would like to be able to follow budget consumption.

In fact , if I have a budget of 20h for exemple, I would like to be able to follow task hours out of budget.
In my project, all timesheet are sumed in actual hours and I would like to have a balance between
Budget and actual hours. In the case in yellow it should be 40H - 7H30 -> 32h30


How could I achieve that please?
Any idea?