Earning $900 at 14 seems extraordinarily high, especially if you're talking about a while ago.

In the UK a 14yo can only work 25h/week outside term time and must have at least two weeks rest over summer, with no minimum wage. £4/h isn't unheard of (a pretty typical rate for a paperound). I worked cleaning cars at a garage decades ago, maybe scraping £3/h for 10 hours a week. I think many of today's 14yos would struggle to break £400 over the entire holiday.

... That is, as is the contention here, unless they have a family member paying them a decent wage.