What would you like to understand?

The optimal solution uses machines 2 and 3, while machine 1 remains unused. The production quantities are $X_1=0$, $X_2=550$, and $X_3=450$.

Conditions: The model includes three machines with specific costs and capacities.; The demand is exactly 1000 units.; The objective is to minimize total cost.; The solution is derived from solving the integer linear program.

The optimal solution uses machines 2 and 3, while machine 1 remains unused. The production quantities are $X_1=0$, $X_2=550$, and $X_3=450$.

Conditions: The model includes three machines with specific costs and capacities.; The demand is exactly 1000 units.; The objective is to minimize total cost.; The solution is derived from solving the integer linear program.