Answer:
Fernando buys 6 cups of milk to make milkshakes for all his friends
Explanation:
Fernando buys 1 quart of milk and one eighth gallon of milk.
1 quart = 4 cups
1 gallon = 16 cups
So,

So, 1 quart of milk and one eighth gallon of milk = 4 cups + 2 cups = 6 cups
So, He buys 1 quart of milk and one eighth gallon of milk i.e. 6 cups
Hence Fernando buys 6 cups of milk to make milkshakes for all his friends