??????????????? ??????ra?????? ?????????????????

????????????????????ra??????????????

???????????????

??繺???1280???!

RA??????????????314000???+1340?????

RA?????????RS??(????)???140000???+1050?????

RS??????????????412500???+2140?????

????????:???10%????ɡ????100?????????????????????ò????????????????????????????????????????????????????????????????y???????????Ч????????μ????44%(????????????)?????????26%????μ????50%??????ò???????ɡ????????????????????????300,500???????????????????????????????????

??總??????????????

?????????????????????汾??

1??????100 .??????????1??????40%??40%*10%=44%(??????????)

2??????100 .????????????????10%???????1??????(????????????????????????????????????100)

3??????100, ???????40%?????40%*10%?????????1?????44%?????(???????????)