Minimum pro plan for WhatsApp

Hi,
I have finished all the steps to activate my WhatsApp account via 360 dialog and everything is OK. I still have to generate the API key from the 360 dialog client hub and I'm ready to go live.

Now I want to buy a pro plan from SnatchBot. My question is the following :
What is the minimum price per month to use the What'sApp channel for my bot?

When I go on the pro plan from my panel, I can only choose between $ 75 or $ 149. And I read somewhere on the forum that whatsapp channel integration works only from $ 79? Is it true ? If yes, how should I do?

Thank you for your support
Yann Longchamp