Alicia had 10\12 yard of fabric. she used 8\12 for a pillow. how much fabric did she have left? explain how you found your answer

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?