Calculate with filter date value greater then date measure

[Ayelet]

Hi experts:)

we are onboarding customers to use self service orders app.

I have this Sales table and i'm trying to calculate for each customer how many orders he placed NOT from the App since he was onboarded.

customer	order date	app order
1111	01/05/2023	yes
1111	22/05/2023	no
1111	03/06/2023	yes
1112	01/04/2023	yes
1112	15/04/2023	no
1112	10/06/2023	no
1113	10/07/2023	no
1114	19/05/2023	yes
1114	10/10/2023	no
1114	01/11/2023	yes
1114	19/12/2023	no

what i did was:

measure 1: 

App start date = calculate (min(Sales[order date]) , Sales[app order]="yes")

measure 2:

now i want to count the number of orders "not from app" since app start date for each customer:

orders since app = calculate(count(Sales[order date]),Sales[app order]="no",Sales[order date]>[App start date])

i get this error for measure 2 :

A function ‘calculate‘ has been used in a True/False expression that is used as a table filter expression. This is not allowed.

which i believe refers to this part:   Sales[order date]>[App start date]

how should i write this measure?

thank you

[Ayelet]

@Fowmy that worked! thank you very much!

[Fowmy · Accepted solution]

@Ayelet 

orders since app =
VAR __appstartdate = [App start date]
RETURN
    CALCULATE (
        COUNT ( Sales[order date] ),
        Sales[app order] = "no",
        Sales[order date] > __appstartdate
    )