Prepare a master production schedule based on the following information:

Week:	1	2	3	4	5	6	7	8
Forecast	100	100	120	120	150	150	160	180
Orders	106	94	65	40	21	9	2	0

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?