What Is the Ending Inventory for Period 8 When the MPS

Multiple Choice

What is the ending inventory for period 8 when the MPS is 0 units?
The ending inventory for period 7 was 89 units.The forecasted demand for period 7 was 120 units while, for period 8, it is 20 units.The customer order for period 8 is 25 units.

A) 64 units
B) 69 units
C) 89 units
D) 54 units