I am working in a company where I need to submit the daily expense bills in the system for my salary.
My company has fixed my salary (e.g. 10000 Yen/month) and they says that my bills should not exceed the above amount. If my bills amount to less than that then it is OK. If not, then I am unable to get my complete salary.
As the billing currency is different and salary deposit currency is different, the system provides three exchange rates, upper rate, mid rate, and lower exchange rate. Will it be OK if I select the upper exchange rate? Or will it be considered as haram, because due to change in rates the salary changes?