Prepare a master production schedule based on the following information:

Week: $12345678$

Forecast $100100120120150150200180$

Orders $10694654021920$

Beginning inventory: $150$

Schedule production whenever projected$-$on$-$hand drops below $20.$

The production lot size is $250$ units.

What is the difference between the Available to Promise Inventory and the Projected On Hand Inventory$)$ for Period $7?$