Pham Company manufactures golf carts. During August, 2020, the company purchased 150 reading lights and stored them in the raw material warehouse. Pham withdrew 90 lights from the warehouse during the month. Thirty of these lights were installed in the cubicles of the accounting staff and the remaining 60 lights were put in the golf carts manufactured during the month. Of the golf carts put into production during August, 2020, 70% were completed and transferred to the company's storage lot. Fifty percent of the carts completed during the month were sold by August 31. The cost of how many lights remained in raw materials inventory? The cost of how many lights remained in work-in-process inventory? The cost of how many lights remained in finished goods inventory? The cost of how many lights went to cost of goods sold? The cost of how many lights were a period cost?