ok so basically for column 3 you times 8 by 4/5 because 1 sparkling water would make 4/5 cups.
8 × 4/5 = 6.4 cups of cranberry juice
for column 5 you divide 40 by 4/5
40 ÷ 4/5 = 50 cups of sparkling water
column 6, basically you times 100 by 4/5
100 × 4/5 = 80 cups of cranberry juice
hope this helps :)