Calculate Net Present Value $($NPV$)$ and Return on Investment $($ROI$).$

Assume your discount percentage is $6\%.$ All calculations should use discounted values.

Project Priority involves the creation of medical software specific for the emergency department. The initial investment is $$200,000$ and you believe the software install will be complete in two years. The first year's investment is $$150,000$ and the second through fifth year's investment is estimated at $$120,000.$ Once the software is installed, you expect to yield savings of $$250,000$ per year for the following $4$ years. The operational costs of the software are $$30,000$ per year. Which includes backups and a software programmer part time assigned to fix implementation problems.