Currently, in the vendor interface (booksellers.pl), there is no option to close/merge multiple baskets at once. Librarians must close each basket individually, which can be time-consuming and inefficient, especially when managing a large number of baskets. This feature request proposes adding a functionality to select and close/merge multiple baskets simultaneously, similar to how other batch operations (e.g., merging invoices) are handled in Koha. This would streamline the workflow for acquisitions staff and improve overall efficiency.