HE spends all his money on his little brother, for expenses like school-boxes and juice boxes
to spend, to consume, to waste. Can also be used of time(literally, 'consume time' ), in the context of work. 時間を費やす: which translates to : it was time well spent / it was time wasted.
expenses, for a road-trip or a night out, misc. things you have to buy.
時間が経つ 時間がかかる? 費やす 時間を過ごす 流れる