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?
$ ___
In one week, Jefferson spends 7 × $3.50 = $<<7*3.50=24.50>>24.50 on cheeseburgers.
In 10 weeks, he spends 10 × $24.50 = $<<10*24.50=245.00>>245.00 on cheeseburgers.
If Jefferson stops eating out, he can save $245.00 in 10 weeks. Answer: \boxed{245}.