The above is a great description of a Retail Sales Clerk, often referred to as a Sales Associate. However, I've been a Sales Associate for most of my life, over the past 30 years of so, and I would offer a different description; a second definition if you will. My experience of being a Sales Associate, sometimes with a wage, most times with a % commission, has been a pleasant one.
My kids were 6 and 7 when they got their 6 year molars but 6 is just an average age. Parents are familiar with when the 2 front teeth come in because that is what is so easily seen when a kid opens his mouth. Your kid may be as young as 10 when the 12 year molars come in. The wisdom teeth are suppose to come in as a young adult (between 18 and 25) but some people's wisdom teeth never come in because their mouth is too small for 32 teeth.
The average child gets his first baby tooth at age six months and then gets three to four new teeth every three to four months. This continues until the second molars erupt at about age two to two and a half years, at which time your child should have all twenty baby teeth. If your child got his first tooth early or finished getting all of his baby teeth early, then he might start losing his baby teeth early too. On the other hand, if he didn't get his first tooth until age twelve or fifteen months, then he might be a little later than average in shedding or losing his first tooth.