Two things:
!. Tithing is stuff, not money.
2. Tithing is an old covenant concept.
Christians don’t tithe. Christians give freely from their heart as others have need.
Send money to your local Catholic radio station organization, not to the diocese or archdiocese. For example, I highly recommend the Catholic radio organization that operates in the Washington, DC area, La Promesa Foundation, a lay apostolate, which does business as “Guadalupe Radio Network” (they operate stations in Texas, Alabama, Florida and New Mexico in addition to WMET AM 1160 in the DC area).