I am using the following formual but the results will not populate in currency format is there a quick solution to correct this? What am I missing?

=IF(OR(Y4="6to12"),"$170.00",IF(OR(Y4="12to18"),"$210.00",IF(OR(Y4="18to24"),"$315.00",IF(OR(Y4="24to30"),"$315.00",IF(OR(Y4="30to36"),"$690.00",IF(OR(Y4="36to42"),"$790.00",IF(OR(Y4="42to48"),"$950.00",IF(OR(Y4="48to54"),"$1200.00",IF(OR(Y4="grtr54"),"$1500.00",IF(OR(Y4="6to1248HR"),"$225.00",IF(OR(Y4="12to1848HR"),"$375.00",IF(OR(Y4="18to2448HR"),"$585.00",IF(OR(Y4="24to3048HR"),"$700.00",IF(OR(Y4="30to3648HR"),"$950.00",IF(OR(Y4="36to4248HR"),"$1250.00",IF(OR(Y4="42to4848HR"),"$1500.00",IF(OR(Y4="48to5448HR"),"$1900.00",IF(OR(Y4="grtr5448HR"),"$2500.00"))))))))))))))))))