I got an email from my dad today

. He wrote:
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I'm not impressed with your long awaited explanation of your spending. You make it sound like a minor oversight when it is in fact a massive overspend. At that rate you would have a personal annual expenditure of £7500.
How do you intend to replace the £600, it's a lot more than you'll earn at Asda over christmas. Don't even think about a student loan, if you have to resort to that then I will cease to pay for the accommodation, so when the money runs out, so will your education.
It may seem trivial to you but from here it looks like more of the irresponsible behaviour that got you into so much trouble in the past.
When I come to see you next week I will want to see evidence of better budgeting and some examples of your course work.
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grr, I knew I was stupid to do it. And I don't even know why I did. When I look back at it, it's just totally unlike my ordinary behaviour. I wonder how I could do it. The 'irresponsible behaviour" thing is mainly the trouble my avoidancy gets me into, which I put things off for as long as possible/ too long if it looks like it will cause me worry and hassle.
Does anybody have any idea just how I am supposed to demonstrate "evidence of better budgeting"?