For the depreciation ques, I said something about relevance and going concern principle ( recognising the asset's contribution to revenue n the future, has to be reflected etc. talked about consistency and comparability too.
For the other 6m question, said it was surprising due to the improvement n DTO despite the consistent levels of bad debts- better management of debtors despite the level of tardy/ bad debtors being relatively the same. Went on to compare budgeted DTO and DTO. Said how in 09 and 10, the business reflected on the variances between the budgeted and actual DTO, thus producing more accurate budgeted DTOs for 2011 and 2011( the days between budgeted and DTO were less) said the improvement was largely due to identifying problems in advance ( using the budgeted DTO) before tackling problems in advance, resulting in improved DTO- favourable trend from blah blah days to lag blah days. Went on to say that the business may have adopted methods such as more rapid invoicing so as to receive cash more rapidly. Perhaps increased discount revenue as an incentive for more rapid payments etc.
Yeah went into a bit of detail