What is the total cost for the customer service category of the value chain? Assembly-line workers' wages Caps for tea bottles $72,300 3,800 Reconfiguring the assembly line 125,700 Customer support hotline 10,600 Delivery expenses 20,800 Depreciation on factory equipment 75,700 Plastic bottles to package tea 52,500 Salaries of salespeople 63,800 Salaries of research scientists 70,900 Customer toll-free order line 6,300