@Ealfardan we should still have totals under each column where applicable. Mostly because this will allow us to show totals even for columns that do not contribute to transaction total in any way. For example Qty column or various custom fields (both feature requests in ideas category).
This brings me why repeat all that again in vertical total section. But we could. Especially when transaction has columns with various totals but only some of them are part of the transaction total calculation.