Running Total or Cummulative Percentage on Count in Grouped Bins

[vmonkey]

I am new to PowerBi and have spent a considerable amount of time struggling with this problem.  I am hoping that someone here can tell me if what I am attempting is even possible.

I have the following table which I requirement to use various sliders on (it currently has two slicers to make it smaller for the question).

Is it possible to create a Measure that will provide a running total of the [Count of Volume] field, in the order from greatest to least, or in the order of the [clc_Rank] measure as seen above?  My end goal is to have a cummulative percentage, but I can't get past this one step.  

The code that I am currently working with for the [clc_RunningTotal] measure is as follows:

clc_RunningTotal = 
CALCULATE(
	COUNTA('vmFNC_DATA_DAILY_RTH()'[Volume]),
	FILTER(
		ALLSELECTED('vmFNC_DATA_DAILY_RTH()'[Volume (bins)]),
		ISONORAFTER('vmFNC_DATA_DAILY_RTH()'[Volume (bins)], MAX('vmFNC_DATA_DAILY_RTH()'[Volume (bins)]), DESC)
	)
)

The code gives a running total, but orders it according to the [Volume (bins] field.  PowerBi won't accept my [clc_Rank] measure to order the table.

Is there a way to do this?

thank you,