Consider the owner of a local boutique. She is deciding if she should upgrade the storage and display containers. The total cost is $2,000, and the depreciation rate is 8% per year. The expected increase in next year’s revenue resulting from the investment is $400. Assume an interest rate of 5%. a. What is the present value of the stream of revenue due to the upgrades? Round to the nearest dollar. $ b. Based on the marginal principle, the owner make this investment because the marginal benefit is the marginal cost.