Explain to me how to use WHM to allow users to purchase hosting and cPanel by brentonstrine

I have a reseller hosting account with WHMCS and cPanel and 2checkout. I want to set things up so that users will be able to go onto my website and buy (or get free with a code) a domain hosting account with cPanel… (Budget: $30-$250 USD, Jobs: System Admin, Web Hosting, WHMCS)