For better or worse, the Consolidated Exchange Rate used Balance Sheet (and maybe on an Income Statement, I can't remember) will be the latest month you're running the report for and it will apply that rate to all months. It's not "smart" enough to apply the individual rates for each month. Maybe that's not even GAAP and that's why they don't, I don't remember.
Anyway, at least that's how I think it works. Easy enough to use some math on your report for a couple numbers to check me.