Rolling averages

BlackYellow

New Member
Joined
Mar 22, 2018
Messages
3
Hello, i have a rather complicated issue that I am trying to resolve.

I have over 200,000 lines of raw sales data in excel.

The data looks something like this:
Customer Id / Invoice # / Date / Inventory / Quantity / Value
1001 / inv1 / 1-1-18 / cheese / 10 / 45.50
1001 / inv1 / 1-1-18 / sauce / 2 / 15.00
1002 / inv2 / 1-1-18 / cheese / 6 / 30.00

I know how to display this data in a pivot table but how do i calculate the rolling average over a 7 day period of sales for each customer?
 

Excel Facts

Does the VLOOKUP table have to be sorted?
No! when you are using an exact match, the VLOOKUP table can be in any order. Best-selling items at the top is actually the best.
If there are multiple sales to a single customer in a given day, you could use the manual version of the above answer, and do a AVERAGEIFS with TODAY() and TODAY()-7, then copy that down.
 
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