????? 9?4??? ??????? 3? ??? ????? ???.
??? ????? 2? 320??, 3? 330??, 4? 180???? ??? ????? 500????, ??? ????? 10% ???.
???? ? ?????? 2?? 1??? ???? ? 11% ??, 3~4?? 1?6?? ??? ? 12% ??? ???? ???? ??.
????? 2?? 3?? ?? ???? ??? ????? ?? ????????, 4?? ?????? ???????? ???? ??.
????? ?? ????? ?? ??????? ?? 2???? ???? ?????? ????? ??? ??? ?? ???? ??? ??? ??? ???.
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