Tolls R Us is a company whose primary business activity is operating toll roads. Tolls R Us receives licenses from the government to operate the toll roads that are typically expensed for a specified period of time. The company routinely projects the anticipated tolls per year that it will be able to charge over the period of the license, as well as its projected per- car toll increases. Often, due to expected growth, it projects an increasing usage of the toll road over time. These projections have proven to be reliable in the past. What method should Tolls R Us use to amortize the cost of these licenses? Justify your answer.