Organising your money

We are going on a short holiday soon. It will be a trip on the tilt train to visit good friends in Townsville, about 2000 kms north, in the dry tropics. We saved the money for the holiday from our meagre monthly allowance, by putting whatever was leftover in to our change jar.Let me explain.We spend $355 a week, or $1420 a month, on everything we need. Of that $1420, $765 is put in the bank for