InputBox for currency convertation

[#1]

Hi,guys!

I have a pivot table like:

		Month	Jan-15	Jan-15	Feb-15	Feb-15	Mar-15	Mar-15
Business Group	Employee	Main skill	Bench Salary	Bench FTE	Bench Salary	Bench FTE	Bench Salary	Bench FTE
International Other	Name 1	.NET	10000	1	10000	1	10000	1
International Other	Name 2	.NET	8000	0.8	10000	1	10000	1
International Other	Name 3	.NET	550	0.55	-	-	-	-

There are values in Bench Salary that can be eiher in USD or UAH. I want to create an InputBox where I'll write currency rates so the UAH values in the 'Bench Salary' field will be converted to USD. Any suggestions how to do that?