Yes. Coinbase is very easy to use. Set up a free account, link a verified bank account, go to the merchant tools and check the box that says "instantly convert to USD" (or whatever it says), make sure the "Keep at least xx BTC in my account" box is unchecked. Now, anytime someone sends bitcoins to that address, they will be sent to your bank account at the end of the day at the exact value that they were when they were sent to you, minus a 1% + $0.15 fee. It's really super simple.
For example, if you make 10 $10 USD sales throughout the day, you will get $100 - $1.15 = $98.85 USD sent to your bank at the end of the day, regardless of the value of BTC.
I hope this helps!