这个句子里包含两个丛句组成.分别由THAT和WHICH引导.
For that reason,a growing number of Japanese women seem to believe that work as a hostess(前面是THAT引导的一个宾语丛句),which (WHICH修饰HOSTESS,作尽一步的解释)can easily pay $100,000 a year,and as much as $300,000 for the biggest stars,makes economic sense.
(WHICH 到SENSE是一个表语丛句)
makes economic sense.在这里作表语用..