?????????????佫????????,9???佫????10????????????

???????佫????9-10?????????????????????2????????9???佫???????9???佫??10???????????

9+1???

9+2???

10???

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

9+1???????900*50=45000

9+2???????1200*50=60000

9+2????10?????????1800*50=90000

?????????????????????????45000+60000+90000=195000

?????????????佫????????????????????????????????????????????????????????ò???20W?????????????????????+1??+2???????????????????????????????????????????????9???Σ???????????????????????о??????????????????????е??????

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