??
?2????????2??? ?(BBC)???????????,??????????2??????????1??,????????,??25%?????????,?????
?????,??,??????????1550????????????25%???????300??2???4???,1250??????????21???????????
?,???????????????,????
???,??????????????????????????????????????,?????????????????25%?????,???????????????10%?
??????????????,???????,????????????????,???? ??:????????
?????????
?????????:????????1550?????????25%???????????????