Jennifer Company has two products: A and B$.$ The company uses activity$-$based costing. The total cost and activity for each of the company's three activity cost pools are provided below in the table. The activity rate under the activity$-$based costing system for Activity $3$ is closest to:

$\backslash$table$[[$Activity Cost Pool,Estimated Overhead Cost,Expected Activity,$],[$Activity $1,$$$60,000,15000,$miles$],[$Activity $2,$$$80,000,50,$cutomers$],[$Activity $3,$$$40,000,20,$setups$]]$

$$4$ per mile

$$1600$ per customer

$$2000$ per setup

$$2000$ per mile