When should they determine total manufacturing costs?

Q 3.26: Tranquil Teas makes bottled iced teas and uses a process cost system. Each day, Tranquil produces 250 bottles of tea; each period, Tranquil produces 23,000 bottles; each year, Tranquil produces 92,000 bottles. In addition, Tranquil does about 180 production runs per year. At what point should Tranquil determine its total manufacturing costs? (if. at the end of each period (/9. at the end of each production run (a. at the end of each year G}. at the end of each day