To change to "Swampy Bag" is needed "Cute Guinea Pig" or another "Swampy Bag" again?
like 30 Cute Guinea Pig = 1 Swampy Bag (Box)
or
30 Cute Guinea Pig = 1 Swampy Bag (another)
30 Swampy Bag (another) = 1 Swampy Bag (Box)
If it is as below, it takes 900 Cute Guinea Pig, wow that a lot