Please explain the solution to this general accounting problem using the correct accounting principles.

Arctic Crest Technologies developed an activity-based costing system for its ''Welding" cost pool. The company expected total overhead costs of $240,000 and estimated 8,000 machine hours for this activity. The actual overhead incurred was $265,000 for 8,800 actual machine hours. What is the activity-based overhead rate (ABOR) used to assign the cost of the Welding cost pool to products? a. $30.00 per machine hour b. $32.50 per machine hour c. $33.13 per machine hour d. $35.00 per machine hour