Totalling amounts

Hi

Great idea and I am hoping I can achieve what I want to do.

I am trying to create a simple application for managing accounts.

I have created a form that contains, simple company information together with details of the invoice (whether credit, debit, how much, type, etc).

I then created several views:
1. Debits Unpaid
2. Debits Paid
3. Credits Unpaid
4. Credits Paid
5. Accounts

What I would like to do is to being to have a total box for each of the views created. i.e. This is how much Debits Unpaid.
Secondly, in the accounts view I would like to split this up into monthly totals with the same total box showing how much credits/debits have been received and then a sub-total of these amounts.

Is this possible please?

Thanks

Rich