Answer:
a. 2003 product yield = 20,000(0.83) + 20,000 (1 - 0.83)(0.20)
= 16,600 + 680
= 17,280 parkas
2004 product yield = 20,000*(0.85) + 20,000*(0.15)(0.20)
= 17,000 + 600
= 17,600 parkas
2005 product yield = 20,000*(0.87) + 20,000*(0.13)(0.20)
= 17,400 + 520
= 17,920 parkas
2006 product yield = 20,000*(0.89) + 20,000*(0.11)(0.20)
= 17,800 + 440
= 18,240 parkas
2007 product yield = 20,000*(0.91) + 20,000*(0.09)(0.20)
= 18,200 + 360
= 18,560 parkas
b. 2003 manufacturing cost per good parka = 420,900 + 12*(20,000)(0.17)(0.20) /17,280
= 420,900 + 12 (680) / 17,280
= 429,060 /17,280
= $24.83
2004 manufacturing cost per good parka = 423,400 + 12*(600) /17,600
= 430,600 /17,600
= $24.47
2005 manufacturing cost per good parka = 424,700 + 12*(520) / 17,920
= 430,940 /17,920
= $24.05
2006 manufacturing cost per good parka = 436,100 + 12*(440) / 18,240
= 441,380 /18,240
= $24.20
2007 manufacturing cost per good parka = 435,500 + 12 *(360) /18,560
= 439,820 / 18,560
= $23.70