solve without computer

A pharmaceutical company is considering spending $1 billion to acquire the production facilities needed to produce a new vaccine. Sales of the new vaccine will increase revenue by $125 million in the first year. This amount is anticipated to increase by 7% each year. The operating and maintenance cost will increase from $40 million (no new vaccine production) to $50 million (with new vaccine production) per year. The production facility can be sold for $0.7 billion at the end of eight years. Use the conventional Benefit-Cost ratio, to decide whether producing the new vaccine is a good idea for the company. Assume that MARR = 15%