Answer:
20 treat.
Explanation:
Given: Operation cost= $20 per week.
Cost to produce each treat= $0.50
Selling price= $1.50
Lets assume the total number of treat in a week be "x".
Cost of production =

⇒ Cost of production=

∴ Total cost of production per week is

Total selling price=

⇒ Total selling price=

Break even is a point of business where cost of production is equal to total selling price.
∴ Forming an equation to have CP= SP ( Break even)
=

Subtracting both side by 0.50x
⇒

⇒

∴ x= 20
Hence, Nick need to sell 20 treat per week to break even the business.