<prompt> Translate the following text to EnglishKwa mfano, kama mtu anaweza kufanya kazi hiyo kwa senti 1.5 kwa kipande, basi huduma ya posta inapoteza senti 4 kwa kipande.  <response>: Suppose further that they can do this for 1.5 cents per piece and that this saves the Postal Service 4 cents per piece. 