calculate using forecasting

sales are in 1000

show all steps and work

toy toy sales \begin{tabular}{|r|r|} \hline 400 & 150 \\ \hline 250 & 90 \\ \hline 400 & 100 \\ \hline 600 & 300 \\ \hline 300 & 150 \\ \hline \end{tabular} calculate the following a) the MAD b) the MPE c) mean bias