The heat loss through the exterior walls of a certain poultry processing plant is estimated to cost the owner $2,800 next year. A salesman from Superfiber? Insulation, Inc., has told? you, the plant? engineer, that he can reduce the heat loss by 75?% with the installation of $17,000 worth of Superfiber now. If the cost of heat loss rises by $190 per year? (uniform gradient) after the next year and the owner plans to keep the present building for 13 more? years, what would you recommend if the interest rate is 8?% per? year?