A Firm Has 56 Units of Product X on Hand

Multiple Choice

A firm has 56 units of product X on hand. Forecasts of demand are for 20 units per week. An MPS quantity of 100 units is planned to arrive in period 3. Customer orders are 24 for period 1, 18 for period 2, and 15 for period 3.
What quantity is available for commitment to new customers prior to the receipt of the MPS quantity in week 3?

A) 14
B) 32
C) 12
D) 20
E) impossible to say without more information