interview question

Dear All

Please light on this question it was asked by the interviwer from me on a Telephonic conversation.

Suppose you have a debtor amounting Rs. 5 lacs and it is your one year old debtor ok!

also we have a security deposit of Rs. 15 lacs from him/her then what will be your action on it with related to term "Ageing"

moreover, he said that TURNOVER is also relevent factor to this question.

but i was not answerable to him..........pl. clarify.