Jefferson stops by a fast-food restaurant for a $3.50 cheeseburger every day. If he only ate at home and eliminated this cost, how much could he save after 10 weeks?
If Jefferson buys a $3.50 cheeseburger every day, he spends $3.50 * 7 days = $<<3.5*7=24.5>>24.50 per week on cheeseburgers.
If he eliminated this cost by eating at home, he could save $24.50/week * 10 weeks = $<<24.50*10=245>>245. Answer: \boxed{245}.