Hello, may you please use the attached Trial Balance to tell me which of the following is the correct Gross Margin of Pringles Stores at 31 December 2021: a) 12% b) 13.43% c) 25% d) 15.43% *May you please showame which accounts you used and how you calculated it, basically the working for this ratio.

Thank you

\begin{tabular}{|c|c|c|} \hline \begin{tabular}{l} Pringles \\ Stores \end{tabular} & & \\ \hline \begin{tabular}{l} Trial \\ Balance at 31 \\ December 20 \\ 21 \end{tabular} & Debit Rand & Credit Rand \\ \hline \begin{tabular}{l} Accounts \\ payable \end{tabular} & & 9000 \\ \hline \begin{tabular}{l} Accounts \\ receivable \end{tabular} & 71000 & \\ \hline \begin{tabular}{l} Accumulated \\ depreciation, \\ equipment \end{tabular} & & 17000 \\ \hline \begin{tabular}{l} Accumulated \\ depreciation, \\ motor vehicle \end{tabular} & & 20000 \\ \hline \begin{tabular}{c} Bank \\ overdraft \end{tabular} & & 35000 \\ \hline Capital & & 501000 \\ \hline \begin{tabular}{l} Cost of \\ sales \end{tabular} & 651000 & \\ \hline Drawings & 160000 & \\ \hline \begin{tabular}{l} Equipment, \\ at cost \end{tabular} & 105000 & \\ \hline Inventory & 52000 & \\ \hline \begin{tabular}{l} Motor \\ vehicle, cost \end{tabular} & 195000 & \\ \hline \begin{tabular}{c} Other \\ expenses \end{tabular} & 100000 & \\ \hline \multirow[t]{2}{*}{ Sales } & & 752000 \\ \hline & 1334000 & 1334000 \\ \hline \end{tabular}