<prompt> Translate the following text to SwahiliAt a presort volume of 40 billion pieces, the postal services cost curve goes through the current operating point discussed in the previous part of this paper.  <response>: Kwa kiasi cha kabla ya kuagiza cha vipande bilioni 40, curve ya gharama ya huduma ya posta hupita katika hatua ya sasa ya uendeshaji iliyojadiliwa katika sehemu ya awali ya karatasi hii. 