Beachwood Classics makes furniture for children. It has received a special order for 1,500 units that will require it to sell a unit (a table and two chairs) for $35. The regular average selling price is $40 per unit. The unit product cost is broken down as follows: direct labor, $5.50; direct materials, $8.75; variable overhead, $1.75; and fixed overhead, $3.25. The company had already budgeted its production at 6,500 units. If the company has spare capacity, what will be the incremental contribution of the special order to operating profit?
A : $28,500
B : $31,125
C : $23,625
D : $21,000