How much to charge for computer/network support work?

Wondering the appropriate rates to charge for side work doing computer and network support for small businesses in New Jersey area. Some previous searching seems to indicate $60 to 100/hour is fair, thoughts and comments? This will mostly be simple stuff for novice users, small business who have no "computer guy" so it's setting up new PCs, upgrading and/or reloading old ones, occasional troubleshooting, broadband router and wireless setup, etc. Might only amount to 1 or 2 afternoons per month per business as a side job. Thanks for your input. Thanks for the input, I'm qualified for the work, degree is in electrical engineering and have several certs including A+, Network+, CCNA and CCNP.