In absentia registration may save you money.

In absentia status is a form of registration now available to academic and professional graduate students undertaking coursework or research related to their degree programs outside of California. Students registered in absentia are only assessed full health insurance fees, and 15 percent of the combined University Educational and Registration Fees. (If applicable, students are also assessed non-resident tuition and/or professional school fees.) More information on in absentia registration is available here from the Graduate Division website.