The overhead absorption rate for product T is $4 per machine hour. Each unit of T requires 3 machine hours. Inventories of product T last period were: Units Opening inventory 2,400 Closing inventory 2,700 Compared with the marginal costing profit for the period, the absorption costing profit for product T will be which of the following?
选项：

A:$1,200 higher;
B:$3,600 higher;
C:$1,200 lower;
D:$3,600 lower