Key figure summating due to a characteristic

Hi experts.

I need to create a report showing the total weight of a kit, so for that i´ve created a new data source in which i´m showing next columns:

Product ID is showing the Kit ID

Description is showing the Kit description

Product ID is showing the ID of the components in every kit

Cantidad de componentes (1) is showing how many eaches of every component are in the kit

Cantidad correspondien (2) is showing the weight for every component

Peso total (3) is showing the reult of (1)(2), which is the total weight of all the eaches of every component

I want to show the addition of all the total weights of every component by kit into the 4th coulmn

how can i do this? is this possible?

Hope for you to help me

BR