The correct answer is A. $27,000.
The flexible budget amount is the amount that should have been spent if actual activity had been equal to the budgeted activity. The flexible budget variance is the difference between the flexible budget amount and the actual amount spent. In this case, the flexible budget variance is $12,000 favorable, which means that the actual amount spent was $12,000 less than the flexible budget amount. Therefore, the actual result amount must have been $27,000, which is the flexible budget amount.
Option B is incorrect because it is the flexible budget amount, not the actual result amount.
Option C is incorrect because it is the sum of the flexible budget amount and the flexible budget variance. The flexible budget variance is a measure of how well the company performed compared to the flexible budget, and it is not part of the actual result amount.
Option D is incorrect because it is the sum of the flexible budget amount and twice the flexible budget variance. The flexible budget variance is a measure of how well the company performed compared to the flexible budget, and it is not part of the actual result amount.