<prompt> Translate the following text to SwahiliPostal Service delivery profitability depends on the revenue for all mail delivered, and it is not likely that cream skimmers could capture all categories of mail.  <response>: Ufaulu wa utoaji wa huduma ya posta unategemea mapato ya barua zote zilizotolewa, na haiwezekani kwamba skimmers za cream zinaweza kukamata aina zote za barua. 