Adding a MIN Filter/Function to Weekly Sales Data

[MiloPowerBI]

Hello all, 

Hoping someone can help me with a little tweak to a measure. 

I'm trying to teach myself some DAX and I'm playing with a very small, limited data set. See below. I have other Products but have currently filtered for Laptops. But this every column I have to play with. Very limited!

I want to have a Matrix which shows the Weekly Sales (QTY) and below that, the cumulative Sales QTY to date. Like so; 

This is the measure I'm using to get Cumulative Total; 

This is essentially working fine, until I try and reduce the filter down to show only Weeks 14 and 15 (ie, the two Weeks for Q2). 

I am now getting this; 

I'm still getting a running Cumulative Total including the Sales for Weeks 1-13. 

Can anyone recommend a way for me to tweak the DAX code above to include some kind of dynamic MIN filter to accompany the MAX function I'm already using?

Any advice? Please be gentle, I'm relatively new to all this and just trying to learn!

[MiloPowerBI]

Ah, of course. So obvious.....when you know how!

Thanks Wilson, that worked a treat. 

[Wilson_ · Accepted solution]

Hi Milo,

By using ALL in your FILTER function, you are ignoring all filter contexts applied to the whole data table. It sounds like you are looking for ALLSELECTED instead.

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