3-22 King Machinery uses ABC.They have estimated the information below for the year. What is the activity rate for machining A $55.00 per machine hour B. $94.50 per machine hour C. $150.00 per machine hour D. $60.00 per machine hour Estimated Cost Estimated Usage Machine setups 159,500 2,900 setups Machining $ 720,000 4,800 machine hours Quality Control 264,000 4,400 tests