It is possible for cost to change without changing the break-even point if the sale of the products cover the the expected amount. For example, Jake is selling an apple for $.50, banana for $.50, and strawberry for $1.50. His most profit sale would be the strawberry because it is the most expensive product. Let say, he sold 4 apples, 4 bananas, and 2 strawberries. He would earn $7 dollars. Now when the seasons for those fruits are over and the demands for them for more expensive. He would increase the sale price for those produce; apple is $1, banana is $1, and strawberry is $2.00. To earn the same amount, $7, before the price change. He would only need to sale 1 apple, 2 bananas, and 2 strawberry. If the cost increase then the selling expectancy decrease, but if the cost decrease then the selling expectancy need to increase.