For Exercise 1.15, see page 9; for 1.16 and 1.17, see page 10, for 1.18 and 1.19, see pages 11-12; for 1.20 and 1.21, see page 15; for 1.22 and 1.23, see page 19; and for 1.24, see page 20.
1.17 Focus on the 80 percent.
Many analyses using data such as that given in Figure 1.4 focus on the items that make up the top 80% of the total cost. Which items are these for our cost analysis data? (Note that you will not be able to answer this question for exactly 80%, so either use the closest percent above or below.) Be sure to explain your choice, and give a reason for it.
1.17
The Cost Centers would include Parts and materials, Manufacturing equipment, Salaries, Maintenance, and Office lease. We need to include Office lease even though it gives more than 80% because otherwise we would only have the top 75% according to the data. So, to get the other 5%, we need to put Office lease in, giving us 82.12% total.