Thank you for catching the math, and getting in touch with us about it.
The ratios and amounts given in the recipe are effective as they are, so you could make it as 55 g, however it would also be appropriate to add more Dandelion root, since it is heavier/more dense and would add a little more support for the liver.
This would make it:
Dandelion root powder (Taraxacum officinale) 15 g
Dandelion leaf (Taraxacum officinale) 10 g
Cleavers (Galium aparine) 10 g
Nettle (Urtica dioica) 15 g
Echinacea root (Echinacea angustifolia/purpurea) 10 g
We will update this in the guidebook for the print copy, thank you again for getting in touch about the discrepancy.