That would be a fair assumption, except for one important fact, which is that the numbers are a combination of withholding tax for both arm's-length and non-arm's-length payments.
The treaty proposed--and the budget contemplated that the treaty would propose--that the withholding tax on arm's-length interest would be eliminated immediately, as of January 1, 2008. It assumed, however, that non-arm's-length interest would only be eliminated over three years, going down from 10% to 7% to 4% to its elimination at 0% after three years. Those factors mean that the $180 million figure can't simply be divided by four to come up with a three-month figure, which you've done for the January to March amount. You need to take one-quarter of the arm's-length component plus 30% times one-quarter of the non-arm's-length interest to come up with the number. I think that's how the $10 million was arrived at.