Peppers Lockdown produces keys for homes and cars. As Peppers planned for next years production, the company decided to implement a high-low system to forecast future costs. With total production of 2,900,000 keys at a total cost of $16,000 in 2021, and total production of 3,700,000 keys at a total cost of $32,000 in 2022, what is the variable cost per key? (Round your answer to 3 decimal places.)