Lucky Cow Dairy provided the following expense information for May Assembly-line workers' wages Caps for milk bottles Reconfiguring the assembly line Customer support hotline Delivery expenses Depreciation on factory equipment Plastic milk bottles Salaries of salespeople Salaries of research scientists Customer toll- free order line $72,700 3,900 125.900 10,300 20,400 75,300 52 200 63,500 70,900 6,900 What is the total cost for the customer service category of the value chain? O A. $73,800 B. $84,600 O C. $10,300