Workings to the nearest thousand

I saw some questions where the answers and the workings should be to the nearest thousand. I just need to that what amounts can this rule be applied. For eg. Xtol (06/2014) has many figures given in question itself. Like there is a total given for interest and dividends paid, an increase in deffered tax provision. So do we need to round all of this to nearest $1000. Just asking coz the answer doesn’t seem apply the rule there