Compare two columns with another two columns and return

Hello,

I need to compare two columns with another two columns and return date from a third colum.
Example I have a zip code with 90004 with 3 different cities and a tax rate of 8.25, for city Los Angeles Hollywood 7.25 and East La 8.45 . In the columns that I need to compare I have Zip code 90004 with the city of Hollywood but I need to compare the zip code and the city and pull out the tax rate how can I get that information in to the third column?
Thanks for your help.