Case C-585/20: Judgment of the Court (Third Chamber) of 20 October 2022 (request for a preliminary ruling from the Juzgado Contencioso-Administrativo No 2 de Valladolid — Spain) — BFF Finance Iberia S.A.U v Gerencia Regional de Salud de la Junta de Castilla y León (Reference for a preliminary ruling — Directive 2011/7/EU — Combating late payment in commercial transactions — Recovery from a public authority of claims assigned by undertakings to a debt collection agency — Compensation for the recovery costs incurred by the creditor in the event of late payment by the debtor — Article 6 — Fixed minimum sum of EUR 40 — Transactions between undertakings and public authorities — Article 4 — Procedure for certification of the conformity of goods or services — Payment period — Article 2(8) — Concept of ‘amount due’ — Taking account of value added tax for the purpose of calculating interest for late payment)