<prompt> Translate the following text to EnglishWakati huduma ya posta inakusanya data nyingi juu ya tabia ya gharama ya waendeshaji wa utoaji wa mji, inakusanya data kidogo juu ya tabia ya gharama ya waendeshaji wa vijijini.  <response>: While the Postal Service collects extensive data on the cost behavior of city delivery carriers, it collects little data on the cost behavior of rural carriers12 For purposes of this analysis, we assume throughout that rural delivery cost behavior is similar to that of city delivery. 