I have this measure
Average Spend =
CALCULATE ( SUM ( Table[Spend] ) ) / CALCULATE ( SUM ( Table[Volume] ) )
The table has a variable month that the data is grouped by
Month Spend Customers var_x var_y
1 100 20 A C
2 300 40 A B
3 500 50 A C
I want to have a graph showing running total spend per customer, so x axis would be month and y axis would be average_spend
Any ideas?

