Very complicated report - Need help

I hope I can explain the challenge.  I am trying to write an Access report which has to show 52 rows of data.  But first of all prior to the opening of the report is a form which asks the user to enter the current year.  Example: "2012".  Then going down the report vertically I need to show the week number in the first column.  So I guess I need VBA code to loop 52 times but increment by weeks or 7 days each row.  And then next to the week number I need a text box filled with a complicated formula.  Here is my attempt at explaining the formula...

"Molds" = sum total of ([Qty] from "tblCast" divided by [Patterns_On] from "tblPartsMasters") for that week (week 1, week 2, week 3, etc.) where [Molder] from "tblCast" = "Airset Floor" and [Cust] = "ABCCompany".  [Cust] is from "tblPartsMasters" joined to "tblCast" by the field [PartN] in "tblCast" and [Part_No] in "tblPartMasters".    Both [PartN] and [Part_No] are text fields.

So the final report will look like:

Week     Molds
1               4
2               16
3               23
4               7
etc through 52 weeks.


I suspect this question should be worth much more than 500 points but if anyone can assist I sure will appreciate it.  I actually have to create 13 more text fields like the one I've explained horizontally on the report but if someone can help with this first one I think I can take it from there.

--Steve