ֹ£
׽5000-240+2*6.25*10=4885
(3500-480-2*50)/200+1=16
׽3500-240+2*6.25*10=3385
(5000-480-2*50)/150+1=30
R1550+2*(120-15)=760
ֲ3500-480=3020
R2550+2*(120-15)=760
ֲ5000-480=4520
R3550+2*(120-15)=760
ֲ3500-480=3020
R4550+2*(120-15)=760
ֲ5000-480=4520
ÿֲ(550-120-50)/200+1=3