We can't tell you how much to bill your clients. Some of our agencies partners bill at 2x or 3x cost; the price is completely up to you and what your client is willing to pay for. Check out this guide here to see what our agencies normally charge for our top services based on the niche: https://docs.google.com/spreadsheets/d/18NFewHxwCzTaa522yYuoEPrHskcFzaDIx7pnkAgqSWs/edit?usp=sharing