Not very elegant ( I am sure someone will improve on this):

=IF(OR(ROUND(MOD(INT((10*A1)+1)/10-0.01,1),2)=0.09,ROUND(MOD(INT((10*A1)+1)/10-0.01,1),2)=0.59),INT((10*A1)+1)/10,INT((10*A1)+1)/10-0.01)

"yk" wrote:

If I currenlty have a formula =INT((10*A1)+1)/10-0.01 to round up to the
nearest $x.x9. However, if the results are $x.09, $x.59, how do I append to
the formula to round up only $x.09and $x.59 to the nearest $x.10?

Thanks.