<prompt> Translate the following text to EnglishUfunuo wa umri wa kawaida wa kuingia unahusu mbinu ambayo gharama huamuliwa kwa kundi kwa ujumla badala ya kwa kila mshiriki mmoja kwa kujitenga.  <response>: The term aggregate entry age normal refers to an approach whereby costs are determined for the group as a whole rather than for each individual participant separately. 