expression, godan verb (-ru)
be of help; be useful; go toward
Used when something contributes to a need, such as money, food, or effort. Often appears in the form 足しになる or 足しにする.
少しでも足しになればと思って、お米を持ってきました。
I brought some rice, hoping it might be of some help.
この
I'd be happy if this money could go toward something useful.