Aspinner has 10 equally sized sections eight of which are gray and 2 of which are blue. the spinner is spun twice. what is the probability that the first spin lands on gray in the second spin lands blue

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?