Translate the following English sentence to French:
"They will often do fewer home deliveries, charge more for retaining post during the holidays, close down a large number of the post office branches and, ultimately, the tariffs for the individual will sharply increase, at which point the only parties which will stand to benefit from this type of practice will be companies which conclude collective agreements at a lower tariff."
Elles livrent de moins en moins à domicile, font payer plus cher la conservation du courrier pendant les vacances, ferment une grande partie des bureaux de poste et enfin, augmentent fortement les tarifs imposés aux clients. Après quoi, seules les entreprises bénéficient de contrats collectifs établis à des prix inférieurs.