A local chemical company is considering replacing its existing distillation column with a new more efficient column. The new column costs $30 million. It has a life of 10 years and a salvage value 500,000. The existing column cost $2.0 million, will last 4 more years and have no salvage value. It could be sold now for $1,400,000. The new column is expected to save $300,000 per year. If the interest rate is 8%, determine if the new column should be purchased. Solve by both present worth and annual cash flow analysis methods.