Debbie Co. manufactures a product requiring two pounds of direct material. During 2015, Debbie purchases 24,000 pounds of material for $74,400 when the standard price per pound is $3.00. During 2015, Debbie uses 22,000 pounds to make 12,000 products. The standard direct material cost per unit of finished product is:

$6.00.

$6.20.

$6.40.

$6.76.