Need Help - Measures

[Myurathan]

I am currently learning DAX. I have created following measures.

Sales Table -->

SalesAmount := SUMX(Sales, Sales[Quantity]*Sales[Unit Price])

Product Table -->

ProductSalesAmount := SUMX(RELATEDTABLE(Sales),Sales[Quantity]*Sales[Unit Price])
ProductSalesAmount1 = SUMX(RELATEDTABLE(Sales),Sales[SalesAmount]) 

For my understanding, these two measures should give me same values, but they do not. 

Please explain me why these values differ?

Thanks in advance

[v-yuezhe-msft]

@Myurathan,

I am not able to reproduce this issue using my sample data.  Could you please share the data of your tables to me via Private Message?



Regards,
Lydia