Given the following Summary Table from a Transportation Method Production Plan: \begin{tabular}{|l|l|l|l|l|l|}\hline \multirow[b]{2}{*}{Quarter} & \multirow[b]{2}{*}{Demand} & \multicolumn{3}{|c|}{Strategy Variable} & \multirow[b]{2}{*}{Ending Inventory}\\\hline & & Regular Prod. & Overtime & Subcontract & \\\hline 1 & 2,600 & 2,500 & 0 & 0 & 700\\\hline 2 & 2,800 & 2,500 & 600 & 0 & \\\hline 3 & 3,500 & 2,500 & 600 & 200 & \\\hline 4 & 4,300 & 2,500 & 600 & 400 & \\\hline \end{tabular}6. What is the value of \( I_{3}\)(ending inventory for the third quarter)? This table is not related to the previous problem.