I Need A Help When It Comes To Calculating Commission

I have a question I need help for, below is a very strict detailed explination of the current scenario I am in and I need assistance for it:

1) I have a percentage of Commission I need to calculate, the percentage of commission constitudes of the following information:

a) Date,
b) Customer Name,
c) Company,
d) Name,
e) 5% New,
f) 3% Ext,
g) Rep,
h) Doble Ref (0.025, 0.015),
i) Total Amount, and
j) Total of Commission.

If a person enters the same customer name more than ones, it will give that person's name a Doble ref (0.015) of commission, if on the other hand that customer is new it will give that person a commision of 0.05% new. I hope this is not intending to confuse you, it just gives the general idea of what the percentage of commission is intended to be.

To come back to the point, I have a form created under Access that holds all the names of the person's reference by in that case "Name" letter (d) described above. If I select for example a person name "Fahed" and I click on the button calculate new commission I want to be able to draw all the commissions that Fahed have done and then use the form above to do the approriate calculation.

The above is a general problem, below is the scenario:

I get a form called New Client, the form New Client is a parent form and underneath that form is a sub form which holds estimates, invoices and so on. Ones again I am giving you the picture of what the form looks like, I cannot paste the pictures here because they would take time and would not be clear. The new Client has a text field called Reference By. That text field is where I need to get for the Percentage of Commission form to be entered under the field Name, letter D (described above). The total of amount is extracted from the subform Invoice, total, of the parent form called New Client, and there is a check mark in the new client called "Already existed" that if I click it, that information is then send on a separate form called "PercentageOfCommission" that will determine if it calculates the percentag of 0.05 or 0.025 depending if it is Calculate Commission or calculate existing commission.

I want it to be able then to do the needed calculation which I already have the approriate formula for and then display in a report what is shown above.

I don't know how to get information from different forms, and I don't know how to display for example ALL FAHEDS with information but are related only to FAHED.

Ones again, let me give you an example:
Date Name Info
15-Feb 05 Fahed Stonyx
15-Mar 05 Fahed Commodore
...
18-Sep 05 Ahmed Apple IIc

I want to display only one name Fahed and when I click for example display summary to show ALLLL the name that holds Fahed that have different Info. Any help would be greatly appreciate it.

If you feel what is posted here is TOO confusing and trying to explain it on the messageboard might take time and you wish to assist a poor soul in need, then you can contact me at devastating_battle@hotmail.com so we can talk live in MSN to be able to describe the matter much clearly. Please don't ignore me and leave me hanging in the air dry, thanks in advance.