Assuming Eric wants to make a cake using 2 cups of sugar, he would need to use 20 pounds of flour. This is because for every 1/4 cup of sugar, he needs 2 1/2 pounds of flour. Therefore, for 2 cups of sugar (which is equivalent to 8 1/4 cups), he would need 20 pounds of flour (8 1/4 cups x 2 1/2 pounds).
