<prompt> Translate the following text to SwahiliWhat is shown is that the postal service would spend approximately 4a per piece to sort and barcode the first 20 billion pieces.  <response>: Kama ilivyoelezwa hapo juu, huduma ya posta inahitaji masharti ya 4 kwa kipande cha posta ili kuorodhesha na kuweka nambari za barcode kwa vipande vya kwanza 20 bilioni. 