What is the average cost of homeschooling in the US?

im homeschooled or should you cyber schooled and it cost nothing for me...they sent me a laptop, printer, books, a mouse thingy pad..the only thing we can keep are the books but everything else we give back when done with school. but yeah certain cyber schools are absolutely free and you can still be involved with the public school you use to go to. im a cheerleader for my old school and i go to dances and all.