SOLVE USING EXCEL:

Manufacturas Monarca uses an automated packaging system in their finishing area. The packaging system costs $400,000. Its market value will be $350,000 at the end of the first year and will drop 10% per year thereafter to a minimum of $33,000. Operating costs are $5,000 the first year, increasing by 9% each year thereafter, maintenance costs are a gradient series of $2,500. MARR is 10%. Determine the optimum replacement interval.