I'm surprised that you can't figure out something as simple as your question!.
Mr. Lee has a personal asset of $600,000USD and the exchange rate is .9US=$1CDN.
So, obviously, the first thing you have to do is to convert his personal asset into Canadian dollars: $600,000 X .90=$540,000 CDN.
Now, I assume that a "GIC" is some sort of short-term investments that Canadian Banks offer. So, if Mr. Lee invests ALL this money in a 30-day GIC, at the rate of 3.25%, then at maturity he should earn:
$540,000 X .0325 =$17,550 per year. But, he has the deposit for only 30 days, so $17,550/365=$48.08 per day. Then, $48.08 X 30=$1,442.40. This is what he earns for 30 days. Since Mr. Lee rolled over the deposit for another 30 days, he presumably rolled the interest that he earned for the first 30 days. If that is so, then he would have:$541,442.40 X .0325=$17,596.88 per year. $17,596.88/365=$48.21 per day X 30 days=$1,446.30, which is the total interest that he earned in 60 days.