Add functionality to the application in Python+django

Employer
[no-member:pro]Denis[/no-member:pro]Denis
Project parameters
Type of cooperationOne-time project
SectionWeb development
Prepaymentwithout prepayment
Payment methodsCash, Bank transfer, Electronic money
Acceptance of requestsclosed
Project description
There is a working application on django-python - a rental program. Each contract is subject to a balance/debt.
You must add a button and field to the main page to generate total debt for all contracts on the current (or specified / selected) date.
You must add a button and field to the main page to generate total debt for all contracts on the current (or specified / selected) date.