<prompt> Translate the following text to EnglishIngawa hii ni proxy kwa ajili ya gharama za kazi na zisizo za kazi, ni kuchukuliwa ya kweli tangu katika Marekani, matumizi ya wafanyakazi wakati wote sawa kutoa makadirio ndani ya pointi chache asilimia ya wale mahesabu na gharama za kazi na zisizo za kazi.  <response>: While this is a proxy for labor and non labor costs, it is considered realistic since in the U.S., the use of workforce full time equivalents provide estimates within a few percentage points of those calculated with labor and non labor costs. 