thanks for reply
but I Try it
=IF(S3<=2000,S3,
(IF(S3<=3000,IF(S3*75/100<2000,2250,S3*75/100),(IF(S3>=4000,IF(S3*70/100<2250,S3*70/100,2800),
(IF(S3<=5000,IF(S3*65/100<2800,3250,S3*65/100),(IF(S3<=5000,IF(S3*60/100<3250,3250,IF(S3*60/100>3500,3500,S3*60/100)))))))))))
what the wrong with...