Need help with this relevant cost question

Yehle regularly uses material Y51B and currently has in stock 472 liters of the material for which it paid $2.634 several weeks ago. if this were to be sold as is on the open market as surplus material it would fetch $5.38 per liter new stocks of the can be must in lost 1,000 liters you have been asked to determine the relevant cost 550 of the to be a customer the relevant cost of the 550 liters of material y51b is $5.820 $2.959 $2.913