Q9. A garment manufacturing company has some of its jeans stone-washed under a contract with an independent contractor. If the independent contractor's operating cost per machine is $22,000 for year 1 and increases by a constant $1000 per year through year 5, what is the equivalent uniform annual cost per machine for the 5 years at an interest rate of 8% per year? (a) $23,850 (b) $24,650 (c) $25,930 (d ) $26,650 (e ) Over $27,000 Q10. Income from a tin mining operation has been decreasing uniformly for 5 years. If income in year 1 was $300,000 and it decreased by $30,000 per year through year 4, the annual worth of the income at 10% per year is closest to: (a) $310,500 (b) $258,600 (c) $203,900 (d) $164,800 (e) $145,600