Inactive Tutor answered 09/24/15
Tutor
New to Wyzant
Profit = revenue - cost
let the price of a collar = x.
revenue = price x quantity = 35x
plug in what you know into the profit equation
profit = 90 and cost = 85
so the equation needed is. 90 = 35x - 85
solve. Add 85 to both sides: 175 = 35x
divide by 35: 175/35 = x
x = 5
charge $5 for each collar