Trading herbs for charcoal or a cure

So my king got diarrhea and since I'm broke,in exchange of cure for it or charcoal for the medecine,I can offer any of the herbs listed in this topic :

-3 Arnica

- 1 Bearberry

-2 Boneset

-1  Buffaloberry

-3 Burning Bush

-2 Carrion Flower

-2 Cedar Bark

-2 Dandelion

-1 Garlic

-4 Ginger

-4 Goldenseal

-2 Mullein

-2 Spoonwood

-2 St. John's Wort

-2 Tansy

-1 Turmeric 

-1 Yarrow

I know it's not much,but I'm desesperate ^^"

You can trade 3 herbs for any 1 on the herbalist page

Oh really ? Thanks for the info !