Power BI Group Total

[jigon]

I have mock dataset looks like below. 

On my visualization, I have two problems: 

1) I am trying to show the total sales by group. - called "group total". But on my dataset, I have Item Code called "/return". I do not want to list "/return" on my visualization. So I filtered it out through filters. 

I created measure called "group total" with the following dax formula : 

group total = CALCULATE(SUM(Table1[Total Sales]),ALLEXCEPT(Table1,Table1[Group],Table1[Date]))

It populates what I want but it is including "/return" in the calculation. - I want the "group total" of group A to be $1700, not $1500. What should I change in my "group total" formula to get what I want? 

2. I want to add a column called "return" that sums all the "/return". So same group will show same amount of "return", just like "group total". 

I created measure "return" just to show you what I want. 

return = Calculate(Sum(Table1[Total Sales]),Filter(Table1,Find("/",Table1[Item code], ,0)<>0))

What I want eventually is something like this. 

I hope I described my problem clear enough.
 

I would appreciate any help!