Use Apple$$s financial statements in Appendix A to answer the following.

Required:

Compute Apple$$s profit margin for fiscal years ended $($a$)$ September $28,2019,$ and $($b$)$ September $29,2018.$

Is Apple$$s profit margin on a favorable or unfavorable trend?

In $2019,$ did Apple$$s profit margin outperform or underperform the industry $($assumed$)$ average of $12\%?$