Single row computation

[canmarroig]

Hi QV brains i need a help pls: I've to calculate   

sum(A * B) / sum(B)

where B is the price of  5 different products.

How can i do it

Tks

[jaumecf23]

Maybe this :

sum({<ProductID={'Product1','Product2','Product3','Product4','Product5'}>}Amount)

[sunny_talwar]

So, what is the problem... is this not working? sum(A * B) / sum(B)