I'm trying to find the average of the first 3 months of data and then find the average of the 4th month and beyond of data. So for instance, the first row, the average of the red values and then the average of the green values.
The start of data for every row could be different and the number total values of each row could be different.
Anyone have a formula that I could apply for each row rather than having to calculate the two averages manually?
Thanks in advance.
Jennifer