How do I solve for owners equity end of period without knowing assets or liability ? And how do I solve for/use EAT to find the other blank spaces?

\begin{tabular}{|c|c|c|c|c|c|c|} \hline \multirow[b]{2}{*}{ Assets, beg of period } & \multicolumn{2}{|c|}{ Firm 1} & \multicolumn{2}{|c|}{ Firm 2} & \multicolumn{2}{|c|}{ Firm 3} \\ \hline & $ & 1,000.00 & $ & 400.00 & & \\ \hline Assets, end of period & $ & 1,100.00 & $ & 500.00 & $ & 1,500.00 \\ \hline Owner's equity beg of period & $ & 500.00 & $ & 200.00 & & \\ \hline Owner's equity end of period & & & & & $ & 1,000.00 \\ \hline Liabilities, beg of period & $ & 500.00 & $ & 200.00 & $ & 600.00 \\ \hline Liabilities, end of period & & & & & $ & 500.00 \\ \hline Revenues of the period & $ & 2,000.00 & & & $ & 600.00 \\ \hline Expenses of the period & \$ & 1,800.00 & & 180.00 & & \\ \hline EAT of the period & & & $ & 20.00 & $ & 100.00 \\ \hline Dividends (from earnings of the period) & $ & 100.00 & $ & 10.00 & $ & - \\ \hline Shares issued (during the period) in $ s & \$ & - & $ & 50.00 & $ & - \\ \hline \end{tabular} \begin{tabular}{|c|c|c|c|c|c|c|} \hline \multirow[b]{2}{*}{ Assets, beg of period } & \multicolumn{2}{|c|}{ Firm 1} & \multicolumn{2}{|c|}{ Firm 2} & \multicolumn{2}{|c|}{ Firm 3} \\ \hline & $ & 1,000.00 & $ & 400.00 & & \\ \hline Assets, end of period & $ & 1,100.00 & $ & 500.00 & $ & 1,500.00 \\ \hline Owner's equity beg of period & $ & 500.00 & $ & 200.00 & & \\ \hline Owner's equity end of period & & & & & $ & 1,000.00 \\ \hline Liabilities, beg of period & $ & 500.00 & $ & 200.00 & $ & 600.00 \\ \hline Liabilities, end of period & & & & & $ & 500.00 \\ \hline Revenues of the period & $ & 2,000.00 & & & $ & 600.00 \\ \hline Expenses of the period & \$ & 1,800.00 & & 180.00 & & \\ \hline EAT of the period & & & $ & 20.00 & $ & 100.00 \\ \hline Dividends (from earnings of the period) & $ & 100.00 & $ & 10.00 & $ & - \\ \hline Shares issued (during the period) in $ s & \$ & - & $ & 50.00 & $ & - \\ \hline \end{tabular}