USERRELATIONSHIP With SUM and Filter Question

Hello,

I have the following tables:

'Calendar'[Date]  1 to M -> 'Sales'[Posted Date]

My calendar table has a calculated column [Is Current Week] that holds a value of 1 if true if the date falls within the current week period I've defined.

I've been trying to write a DAX expression that will return the total sales using USERELATIONSHIP based on a inactive relationship between Calendar[Date] and Sales[Order Date].  I can get a total with this expression for a cummulative value:

     CALCULATE( SUM('Sales'[Amount]), USERELATIONSHIP ( 'Calendar'[Date], 'Sales'[Order Date] ))

However, when I try to filter for only sales for the current week, my expression returns nothing.  I've tried a few permutations but always end up with a blank result.   Here is my latest attempt:

     CALCULATE(CALCULATE( SUM('Sales'[Amount]), USERELATIONSHIP ( 'Calendar'[Date], 'Sale'[Order Date] )),  FILTER(All 

     ('Calendar'),'Calendar'[Is Current Week] = 1))

Anyone have any pointers on how or if I can accomplish this?  I have reviewed this link:

https://www.sqlbi.com/articles/userelationship-in-calculated-columns/

But can't quite seem to get things working with the filter.