I'm buying proactive but I don't know the sales tax, I live in California HELP!?!?!?!?

Answer 1

CA state sales tax is 7.25%
Many counties have additional sales tax. Los Angeles County is at 8.25%. San Diego County is 7.75%.

Here is a link to a list of sales tax rates for all cities and counties in California:

http://www.boe.ca.gov/cgi-bin/rates.cgi