Using the information provided from Apple's 10-K, comment on Apple's performance during its first full fiscal year operating in the pandemic (fiscal year ending Sept 2021). Make sure to present a theory for the changes in revenues and gross profits in your answer.

\begin{tabular}{|c|c|c|c|} \hline & \multicolumn{3}{|c|}{ Years ended } \\ \hline & \begin{tabular}{c} September 25 , \\ 2021 \end{tabular} & \begin{tabular}{c} September 26, \\ 2020 \\ \end{tabular} & \begin{tabular}{c} September 28, \\ 2019 \end{tabular} \\ \hline \multicolumn{4}{|l|}{ Cost of sales: } \\ \hline Products & 192,266 & 151,286 & 144,996 \\ \hline Services & 20,715 & 18,273 & 16,786 \\ \hline Total cost of sales & 212,981 & 169,559 & 161,782 \\ \hline Gross margin & 152,836 & 104,956 & 98,392 \\ \hline \end{tabular}