Final answer:
Weighted-average process costing provides managers with information about changes in costs per unit from one period to the next in business.
Step-by-step explanation:
Weighted-average process costing is a costing method used in business to calculate the average cost of production per unit. It takes into account different periods of production and assigns weights to the costs incurred during each period. This method provides managers with information about changes in the costs per unit from one period to the next, allowing them to analyze trends and make informed decisions about pricing and production.