I’m using this formula: SUM_BY_KEY(data.list of products, “total_item”) to add a field from a list, but the value only returns 0, could someone help me.

I’m using this formula: 'R$ ’ + ROUND(data.tb_calc_item.preco * data.tb_calc_item.qtde, 2) , to calculate the total value of the item, through this field I bring the total sum

attached are the screens of how I put my formulas