Your Terms and Conditions section is like a contract between you and your customers. You make information and services available to your customers, and your customers must follow your rules.
Common items in a terms and conditions agreement allow you to:

15% OFF all packages of 3
15% OFF 1 area
20% OFF 2 areas
25% OFF 3 or more areas
BUY 4 get 5th one FREE
1 -Syringe $499
Mini Lip Plump $350
Purchase 65 GET 75
Purchase 100 GET 120
$899 for package of 6 sessions