Well where do you live? Your blurb says "in your refrigerator." This is totally useless information. The price you mention could be right, too high, or to low depending on where you are. New York city has one rate and Albany New York another.
Like Paddy said, the general price for hired entertainment varies from place to place, based on the general wealth of an area; magicians general charge more in affluent neighborhoods and suburbs.
If you truly are a class act, and can entertain someone's kids better than the next guy with genuinely unique, mind-blowing stuff, why should they pay you any less than the next guy, right?
Set your prices, don't get forced into charging a certain amount.
I'd go into the business aspect, but it's 4:20 a.m., and I'm exhausted. Just remember that people expect to get what they pay for. If $220 seems high for an entire show to you, you may want to rethink your presentations.
Have a good one bud, night.