Spending money for convenience makes a lot of sense to me, so long as you can afford it. I'm afraid i can't afford taxis on a regular basis.
Lets put this in context. Its 22 sheets for less than $2.40 so each sheet is less than 11 cents.
How much cheaper would it be if you cut down a roll from Costco?
I agree with norma, why spend the effort to save a nickel or so per sheet...especially since the downside would be having to work to clean a burnt cookie tray.
We could sit and cut TP rather than buying Kleenex for Shabbos and save about 30-40 cents per Shabbos. But isn't it nice not to have to do that every Friday?
And lets not forget MYI - happy wife, happy life (Bava Metzia 59a-b has more serious expressions if you want to look them up.)