How to sum by groups and add a filter

[Shimpei]

How can I create a measure?
I would like to sum "Revenue" and "Margin" by "Customer" and add a filter by sum results for "Margin" (i.e. Margin > 0, Margin <=0)
This is the raw table

My goal is to make the table like this out of above data.

[amitchandak]

@Shimpei , Create a measure like

BU Customer = calculate(Sum(Table[Margin]), filter(allselected(Table), Table[Customer] = max(Table[Customer])  && Table[business Unit] = max(Table[business Unit])  ))

Postitive = calculate(Sum(Table[Margin]), filter( Table, [BU Csutomer]>0 ) )

Negative= calculate(Sum(Table[Margin]), filter( Table, [BU Csutomer]<0 ) )

[Shimpei]

Thank you. 
One thing that I would like to achive is that I want to filter based on whether the margin is posive for "Business Unit 1" or not. Right now it is filtering the positive and negative for each business unit, but is there anyway that I can filter based on Business Unit 1 results?