A Maths Dictionary for Kids Quick Reference is a device friendly html version with definitions and detailed examples for over 950 math words and terms.
The statistics about the average cost of a haircut vary, but a few years ago American Salon, a publication for beauty industry professionals, reported the numbers as $21 for a cut in a salon with fewer than 6 chairs, and $44 for a salon with more than 13 chairs.
Dividing the monthly cost by 160 gives me the amount of money it costs to have basic hair cutting supplies and tools on hand each hour. It costs $10.86 to cut hair in my salon for one hour. In order to make a profit and take home money to make a living, I have to bring in more than $10.86 each hour. It takes me 20-30 minutes on each man's or child's haircut and 30-60 minutes on each women's haircut.