Usually, it takes around 20 units between the eyes and from 8-30 units in the forehead. For the crowsfeet the average is 8 units on each side. Bunny lines around the nose usually take around 2-8 units. For the lip lines, 2-6 units. For downturned mouths injections in the lower lip / chin area usually requires 4-8 units. Basically, you just have to multiply the number of units by the cost per unit to get what approximately you’ll be expecting to pay. Botox typically costs around 10-16 dollars per unit. When you use more botox the cost is usually less and doctors usually have a sliding scale and the price goes down with more units used per client.