Median in case open ended frequency distribution?

Hello All,

I am confused what would be the answer to following question.

Can we find out the Median from the following data? How?

*********** Wages of workers in a factory

Monthly Income (Rs.) ---------- NO. of Workers

Less than 2000/- ---------------- 99

2000-2999/- ----------------- 290

3000-3999/- --------------- 240

4000-4999/- ---------------- 49

5000 & above --------------- 1100

Well I know this is an open-ended distribution and median is possible for such distribution but I am confused because highest frequency is falling in an open-ended class so what will be (h = interval) in this distribution?

Any Help Please?