Banana

I just ate a banana and thought: Man, I've saved 3.70 when I bought groceries on friday, but I could have saved 6.40 or even 11.10 if I had bought two/three bottles of on sale laundry soap instead of one only.
So does long term money-saving justify going beyond this week's budget limits?

I have to go.

PS: It was actually 39 countries, I think.