A manufacturer is considering producing a modified 8-cylinder engines, which will require a total investment of $900,000 to purchase 6 new CNC machines. The expected yearly production capacity will be 1,000 engines per year, and each engine will be sold for $800. The annual operating cost is expected to be $600,000 per year. Each CNC machine can be sold for $5,000 after 6 years.
1) Determine the ROR for this investment
2) If the manufacture wants to make 15% ROR, what should be the extra income required?