Agency Fee

Dear Parents I urgently needs a advise with those mention below and I hoped to get some help. #01: how much do you pay for a agency fee when you hire a transfer helper #02: what does the agency fee included in the package #03: usually how many months with placement will employer gets #04: I was charged as $3600 for agency fee and when I asked what is it included, she told me services only?? I was like??