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Capital Budgeting Decisions. As the capital budgeting director of Denver Plastics Inc., you are analyzing the purchase of a part-molding system. The new system has a price of $1,050,000, plus an additional $50,000 in installation costs. The new system falls into the MACRS 5-year class, has a 5- year economic life, and a $400,000 salvage value. The new system will require a $150,000 increase in the spare parts inventory. The primary advantage of the new system is that it will decrease operating costs by $275,000 per year. Denver Plastics has a 10% cost of capital and a marginal tax rate of 40%. Should it purchase the system? 

1. Calculate NPV 

2. Calculate IRR 

3. Calculate MIRR