Scheme 2: Donation can only offset 12% of the profit, that is to say, it can only offset 1 0,000 *12% =10.2 million, and the other 800,000 cannot be offset.

Option 3: The annual donation of 6.5438+0.00 million can be offset, because it is 6.5438+0.2 million less.

Therefore, the third scheme has the highest cost performance.