Lucky Cow Dairy provided the following expense information for​ May: Assemblyminusline ​workers' wages $ 72 comma 300 Caps for milk bottles 3 comma 900 Reconfiguring the assembly line 125 comma 600 Customer support hotline 10 comma 800 Delivery expenses 20 comma 900 Depreciation on factory equipment 75 comma 000 Plastic milk bottles 52 comma 000 Salaries of salespeople 63 comma 000 Salaries of research scientists 70 comma 700 Customer tollminusfree order line 6 comma 100 What is the total cost for the customer service category of the value​ chain? A. $ 16 comma 900