<prompt> Translate the following text to EnglishIngawa mbinu hii inaonekana kuwa ya busara, kuna uwezekano wa overstatement kubwa au understatement kwa sababu kiasi cha takwimu ya ndani postage-msingi terminal ada mahesabu chini ya utaratibu huu inawakilisha asilimia 4 ya jumla ya malipo ya FPAs na asilimia 14 ya jumla ya malipo DC.  <response>: Although this approach seems reasonable, there is a potential for substantial overstatement or understatement because the amount of estimated domestic postage-based terminal dues calculated under this procedure represents 4 percent of total IC payments to FPAs and 14 percent of total DC payments. 