Why using a measure as a variable in another measure not working

[YukiK]

I've encountered cases where I have a measure (Measure A) that I want to use multiple times in another measure involving CALCULATE (Measure B).

It works fine without using variables, but it feels redundant to call Measure A mutiple times in Measure B so I attempted to store Measure A as a variable in Measure B, appearently that breaks the filter context or something and Measure B no longer work.

Can someone explain what's going on in this senario? I'd like to understand why using a measure in another measure as a variable is not working as expected.

Working:

Canada Sum of Sales =

CALCULATE( [Sum of Sales], financials[Country] = "Canada" )

Not working:

Canada Sum of Sales - not working =

VAR _sales = [Sum of Sales]

VAR _result = CALCULATE( _sales, financials[Country] = "Canada" )

RETURN

_result

Hope what I mentioned made sense. You can download the file here: https://github.com/StuffbyYuki/PBI-Community-Forums/blob/main/Calculate%20with%20Variables.pbix

Thansk in advance!

[CNENFRNL · Accepted solution]

What's done is done; once a variable is calculated for the first time, its value persists regardless of any other calculation context.

[YukiK]

Makes sense. Good to know! Thanks.