cheating on a budget

Is it really cheating on a budget if you claim an expense made on 9/28 on the October budget?

In other news, I saved 91% at Kroger yesterday :). I got 3 bottles of Diet Dr. Pepper for only $.64. I told my husband that and he thought I meant $.64 a piece... nope! They were $.21 a piece after various rebates I had received.

If only I could do that every week.