I will assume we will start this on Nov 6 (first Monday in Nov)
Row 1 has headers: A1=Date, B1=Payment, C1=Total, D1=Week,E1=Week of,
F1=Paid
A2 date Nov 6 in local date format,
B2 how much you paid in on Nov 6 (might be zero),
C2 formula =SUM($B$2:B2) and copied down the column,
D2:D20, numbers 1,2,3.....
E2 =A2+7*(D2-1) and copied down column
F2 =IF(SUM(B:B)>D2*150,150,IF(SUM(B:B)-150*D1>0,SUM(B:B)-150*D1,"")) and
copied down column
You could copy the formals just 5 rows down and let Excel 2003 automatically
extend them as needed
Enter new data in A and B cells as you make payments; columns E and F tell
what is needed
I will send file to your private email
best wishes

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Bernard V Liengme
www.stfx.ca/people/bliengme
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> Hi folks - a query which will probably seem a little bit too banal,
> but you never know.
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> There are 10 types of people, those who understand binary and those who
> don't.