computation of currency future fair value

Hi friends,

I've one problem wants to know how to solve it,

One year interest rates in US and India are say 5% and 10% respectively and the spot rate of USD in India is Rs. 43. Then one year USD/INR futures fair value is:


I wanted to know which formula can be applied to get the result,
your help will be appreciated,

Thanks in advance.
durai007