Question 42256
Let k be the amount of Kona and a be the amount of amaretto.
The setup looks like this:
6.20k + 5.80a = 6.10(k+a)
6.20k + 5.80(18) = 6.10(k + 18)
620k + 580(18) = 610(k + 18)
620k + 10440 = 610k + 10980
10k = 540
k = 54 pounds