Some help is apprecaited I got question marks for all the months not sure what i did wrong on excel but i do need help tp solve all of these.

A linear programming computer package is needed. capabilities as shown, the management team does not think a smooth production schedule with the same production quantity each month possible. \begin{tabular}{|l|c|c|c|} \hline & February & March & April \\ \hline Sales forecast & 15,000 & 16,500 & 20,000 \\ \hline Production capacity & 14,000 & 14,000 & 18,000 \\ \hline Storage capacity & 6,000 & 6,000 & 6,000 \\ \hline \end{tabular} 3,s1= ending inventory in month 1,s2= ending inventory in month 2 , and s3= ending inventory in month 3.) s.t. February Demand March Demand April Demand Change in February Production Change in March Production Change in April Production February Production Capacity March Production Capacity April Production Capacity February Storage Capacity March Storage Capacity April Storage Capacity Find the optimal solution. (F,M,AI1I2,I3D1D2D3s1s2s3)=(