Match funktion that calculates total amount of needed packagin

Hello.

In my logistics department we need to have a tool that helps us when to order new packaging material. Packaging is used differently if it is part 1 och 2 that is shipped which reguire a demand vs packaging instruction summary.
I have attaced a workbook with the basics in this and I need support how to write the summary formula which I think should use a index/match-formula with a twist.

I can't solve it myself and hope for some support.

/Anders