Basing your wage off what servers make per hour is not the way to do it. They get paid a lower hourly wage because they earn tips to make up the difference, and that is assuming they get to keep 100% of their tips, which most don't if they take a lower hourly rate. For example, I may agree to work for X restaurant for $5/hour, but I get to keep 90% of my tips and pay out 10% to the bus staff. But if I only get to keep 40% of my tips because I have to pay out to bus staff, hostess and expiditers, then the hourly wage should be in the $8/hour range. See how this does not translate to straight labor making a cake?
You should be paying yourself Federal minimum wage at the minimum.