Calculate the average return and variance of returns

\begin{tabular}{|l|r|r|} \hline \multicolumn{3}{|c|}{ Coca-Cola } \\ \hline Date & \multicolumn{1}{|l|}{ Price } & \multicolumn{1}{|c|}{ Return } \\ \hline 01/12/2020 & 48.99984 & 0.85% \\ \hline 02/12/2020 & 49.065754 & 0.14% \\ \hline 03/12/2020 & 49.696609 & 1.29% \\ \hline 04/12/2020 & 50.704102 & 2.03% \\ \hline 07/12/2020 & 49.894348 & 1.60% \\ \hline 08/12/2020 & 50.073242 & 0.36% \\ \hline 09/12/2020 & 50.214481 & 0.28% \\ \hline 10/12/2020 & 49.950836 & 0.52% \\ \hline 11/12/2020 & 50.233307 & 0.57% \\ \hline 14/12/2020 & 50.15799 & 0.15% \\ \hline 15/12/2020 & 50.694691 & 1.07% \\ \hline 16/12/2020 & 49.960255 & 1.45% \\ \hline 17/12/2020 & 50.15799 & 0.40% \\ \hline 18/12/2020 & 50.600536 & 0.88% \\ \hline 21/12/2020 & 49.724861 & 1.73% \\ \hline 22/12/2020 & 49.67778 & 0.09% \\ \hline 23/12/2020 & 49.979084 & 0.61% \\ \hline 24/12/2020 & 50.31805 & 0.68% \\ \hline 28/12/2020 & 50.995995 & 1.35% \\ \hline 29/12/2020 & 50.967751 & 0.05% \\ \hline 30/12/2020 & 51.259628 & 0.57% \\ \hline 31/12/2020 & 51.636265 & 0.74% \\ \hline \end{tabular}