Caspian Sea Drinks is considering the production of a diet drink. The expansion of the plant and the purchase of the equipment necessary to produce the diet drink will cost $27.00 million. The plant and equipment will be depreciated over 10 years to a book value of $1.00 million, and sold for that amount in year 10. Net working capital will increase by $1.29 million at the beginning of the project and will be recovered at the end. The new diet drink will produce revenues of $8.91 million per year and cost $2.22 million per year over the 10-year life of the project. Marketing estimates 10.00% of the buyers of the diet drink will be people who will switch from the regular drink. The marginal tax rate is 21.00%. The WACC is 12.00%. Find the IRR (internal rate of return).

Correct answer is 13.9882

Not sure how they got this. Can someone help?