"How do I show the sum of a column in my Fiori List Report? " comes up again and again in ABAP forums, and the usual first answer is "add @Aggregation. default: #SUM ".
Source: [Dev.to](https://dev.to/abapforagents/column-totals-in-a-fiori-elements-list-report-with-rap-more-than-aggregationdefault-1252)