Unable to add '$0' price

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6
-- Browser(s) name and version -- : Google Chrome

Hello,

I'm trying to add multiple prices to the courses- For the ones under the red rectangle as per the attachment in this thread. I want it to display $90.00 and $0.00 like the other products. Whenever I try to add $0.00 to the product and save, the change isn't reflected. I would like to make the product "$0.00" price only for one user group that I've created. The user group is "Free". Please assist.

Please ignore this topic as I've resolved it.