A firm has 72 units of product A on hand. Forecasts of demand are for 10 units per week. A Master Production Schedule (MPS) quantity of 150 units is planned to arrive in period 4. Customer orders are 17 for period 1, 12 for period 2, 8 for period 3, and 4 for period 4.

Required:
What quantity is available for commitment (available to promise) to new customers in weeks 1, 2, and 3?