You're playing the slots and "win" twenty-five bucks!   you're stoked. during the past ten weeks, you've won another fifty bucks. but you've dropped two bucks in the slot machines every day for ten weeks.

you're wrong. try again. here is a hint:   total income is $25 + $50. total expenses in 10 weeks are 70 * $2 (10 weeks are 70 days). looks like a loss, right? you lost $65 ($75 - $140).