Okay, I have a spreadsheet. Cell A1 contains the month, Column B contains
all the weekdays of that month. Daily data is stored is Column C. I want to
do weekly totals of the data in Column C as well. However, if the user
inputs a different month in A1, the weekdays will all change, shift...etc.

Therefore, to total week 1, I need to locate the first instance of Friday in
Column B, and then add that to everything above it. Week 2 needs to find the
2nd instance of Friday and add everything from that Friday to the first
Friday...and so on.

How does one do this?

Thank you very much....

Arlen