Sumproduct / mathjs help

Hi everyone,

I’m (trying) to build a price comparison app.

I need help with calculating the Total Order Value by Supplier (Price Comparison on picture).

I have a DataType for “Shopping List” and “Price List”.
But not quite sure how to do the sumproduct, if this is what I should do, to get to my 2 totals of (24$ and 16$).

Hopefully I’m clear enough!

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