SUMX result in power pivot

[Dibritti]

Hello,

I´m very new in dax, so I please call for your help and patience,

I have an issue to wright the SUMX formula in Power pivot,

I can't get the formula to give me a simple result of multiplying the column X with column Y
This is my formula:

=SUMX(Base;Base[Price]*Base[Quantidade])

the result is wrong and it repeats (same result) in every rows in the table and the data in each row is different
ex: of result:
Column base[price] = 1200
column base[quantidade] = 12
result column = 2228924522,89161

Can you please help ?

Best regards,