All Weather makes umbrellas and uses a process cost system. Each day, AllWeather produces 640 umbrel

All Weather makes umbrellas and uses a process cost system. Each day, AllWeather produces 640 umbrellas; each period, AllWeather produces 18,200 umbrellas; each year, All Weather produces 72,000 umbrellas. In addition, AllWeather does about 100 production runs per year. At what point should AllWeather determine its total manufacturing costs?A : At the end of each dayB : At the end of each yearC : At the end of each production runD : At the end of each period