how much u offer for this service ?
sorry if you cant read, I will not hire you.
I think there is a misunderstanding with both of you:
For DeveloperAPK: it is stated in the OP that you have to provide your price that if you are already working on that service then you will have your price for that. A profession designer have their own pricing structure for their job.
For HardyGoodsLtd: It is possible that he asked for your budget as many professional often ask for the budget from the person who need the service.