=IF(A1<=30000,0, IF(A1<=45000,(A1-30000)*10%, IF(A1<=60000,1500+(A1-45000)*15%, IF(A1<=200000,1500+2250+(A1-60000)*20%, IF(A1<=400000,1500+2250+28000+(A1-200000)*22.5%, IF(A1<=600000,1500+2250+28000+45000+(A1-400000)*25%, IF(A1<=700000,4500+2250+28000+45000+(A1-400000)*25%, IF(A1<=800000,9000+28000+45000+(A1-400000)*25%, IF(A1<=900000,40000+45000+(A1-400000)*25%, IF(A1<=1200000,90000+(A1-400000)*25%, IF(A1>1200000,300000+(A1-1200000)*27.5%,0)))))))))))