Bird's Eye Treehouses, Inc., a Kentucky company, has determined that a majority of its customers are located in the Pennsylvania area. Therefore, it is considering using a lockbox system offered by a bank located in Pittsburgh. The bank has estimated that use of the system will reduce collection time by two days. Average number of payments per day Average value of payment Variable lockbox fee (per transaction) Annual interest rate on money market securities 750 $ 570 $ 18 7% a. What is the NPV of the new lockbox system? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. Suppose in addition to the variable charge, there is an annual fixed charge of $5,000 to be paid at the end of each year. What is the NPV now? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) a. NPV b. NPV