Which of the following is NOT one of the key inputs into the aggregate plan? Group of answer choices Constraints: e.g. overtime, layoffs, storage capacity, stockout limits, available materials from suppliers Production information: labor or machine hours per unit and current inventory levels. Aggregate demand forecast for each period Relevant costs: regular time labor, overtime labor, holding cost, stockout cost, hiring/layoff costs, subcontracting cost Inventory policies for all downstream customers, e.g. reorder points, order quantities, base-stock levels