I have a square grid and I have multiple centroids on another layer. These centroids have many attributes as values. I want for each grid cell to assume the attributes of the centroids inside them. For example, if a grid has two certain centroids inside it, I want the grid to get the sum of the values for each attribute from each centroid inside it (i.e. if centroid 1 has A=3 and B=2, and centroid 2 has A=2 and B=5, the grid cell should have the attribute values of A=5 and B=7). How can I do this ? I use the last version of QGIS (3.28).