Use a pivot table object with article, description and magazzino as dimensions and sum(qta) as expression. Then drag the magazzino column header to the right above the column header of the expression. Once you see a thick blue arrow-headed line you can let go and the dimension will be pivoted to columns instead of rows. If you think you should include the word magazzino in the header name you can change the magazzino dimension to a calculated dimension: ='magazzino' & only(magazzino)
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