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Thanks very much Skyline D. Sorry, didn't explain it very well, but yes, that is what I meant for the first part. I assumed they were after what you described (�300 being deducted from motor expenses in the p&l account, and increasing drawings in balance sheet).
The issue of the bad debt confused me more. 'Provision for bad debt' in the trial balance was given at �1000. A note in the question said (in so many word) that... "The company is to write off a debt of �500. The provision for bad debts is to now be �1500". That's all the information it gave. Can't remember exactly what I did now, but messed it up. Ah well.
Thanks for your help!