If it were my daughter, I'd probably do more of the tabulating what it cost for extra food/power, etc. OR, she could take over buying/paying for some of it.
Mine already know about budgeting and such. We use 'The Pocket Money Plan' and they have savings accounts, bonds and their CTFs. The older two go online with my help and monitor their accounts.
They come with me shopping a good deal and we look at what things cost, comparison shop, etc.
They have chores in the home appropriate to their age, per the plan, and get money based on this.
The goal of this all for us is for them to learn that families are units that work best as a team, as they are part of that, their role is vital to our strength. Also financial independence, the value of money and that things require work to get.
I'd also, if I could afford it, go with the wise suggestion of chores in exchange for taking off less dole money (or earnings if they're living at home and working).