Answer:
$5.97 per liter
Step-by-step explanation:
The relevant cost would be the replacement cost.
Purchase the liters would require $5.97 per liter.
The purchase cost is a sunk cost.
If the company assing that cost it would not purchase the same ammount of liter again.
Same goes for the open market cost, it will not purchase the same amount of liter using this cost.