Assembly$-$line workers wages $$75,000$

caps for milk bottles $$5000$

reconfiguring the assembly line $$160,000$

customer support hotline $12,000$

delivery expenses $25000$

depreciation on factory equipment $81,000$

cardboard milk cartons $52,000$

salaries of salespeople $63,000$

salaries of research scientists $84,000$

customer toll free order line $4,000$

customer tollWhat is the total cost of research and development at Farm Fresh Dairy?

$$84,000$

$$155,000$

$$88,000$

$$239,000$