A bulldozer with a first cost of $85,000 may be used for a maximum of 6 years. Its salvage value, which decreases by 15% per year, is described by the equation S70,000(1-0.15)^n, where 'n' is the number of years after purchase. The operating cost o1 the dozer will $45,000 for year 1, and will increase by a constant amount of $5,000 per year from years 2 to 6. At an interest rate of 12% per year, what is the Annual Worth (AW, in $) that corresponds to the economic service life of the machine? ____