<prompt> Translate the following text to SwahiliPostal Service have implicitly recognized the absence of significant scale economies in mail processing and transportation functions in the Postal Services rate structure.  <response>: Huduma ya posta imekubali kwa njia ya wazi kwamba hakuna uchumi mkubwa wa kiwango katika kazi za usindikaji wa barua na usafirishaji katika muundo wa kiwango cha Huduma ya posta. 