<prompt> Translate the following text to EnglishUharibifu wa kiasi kwa cream skimmers itakuwa na juu ya bei zinazotokana na Huduma ya Posta ingekuwa na kulipa ili kudumisha huduma ya ulimwengu?  <response>: would the loss of volume to cream skimmers have on the resulting prices the Postal Service would have to charge in order to maintain universal service? 