Nicotine salt

Hello i'm French and here salt nicotine is quite expensive because of stupid laws, French laws allow to sell nicotine only at 20MG 10ML maximum per bottle (around 1$ each...) I found a chinese website that sell 100ML at 200MG/ML for 55$ (35+20$ of shipping fee, damn).

So i have a question : converting that 100ML bottle to 20MG 10ML how much does it cost per 10ML bottle?

I'm very bad at maths sorry haha