Kiwidale Dairy is considering purchasing a new ice-cream maker. Two models, Smoothie and Creamy, are available and their information is given below. Answer parts (a) and (b) below. First cost Service Life Annual profit Smoothie Creamy $15,000 $37,500 12 years 12 years $4200 $10,800 $3520 $2250 $5000 Annual operating cost $1200 Salvage value a. What is Kiwidale's MARR that makes the two alternatives equivalent? Use a present worth comparison. Hint: Use i = 0.15 and i = 0.20 for the linear interpolation. The MARR that makes the two alternatives equivalent is approximately percent. (Round to one decimal place as needed.)