unable to create bucket on sals value

SET ClassA AS
filter([DimGeoGraphyBuyer].[GeographyHierarchy].[FIPS Code], [Measures].[DistibutorSalesSum]>80
or [Measures].[DistibutorSalesSum]<100
)

SET ClassB AS
filter([DimGeoGraphyBuyer].[GeographyHierarchy].[FIPS Code], [Measures].[DistibutorSalesSum]>101
or [Measures].[DistibutorSalesSum]<200)

i need to create bucket A  value between  >80 and < 100 but it's not workin

Regards,

Manish