Problem 6-3A Ziad Company had a beginning inventory on January 1 of 150 units of Product 4-18-15 at a cost of $20 per unit. During the year, the following purchases were m Mar. 15 400 units at $23 Sept. 4 350 units at $26 July 20 250 units at $24 Dec. 2 100 units at $29 1,000 units were sold. Ziad Company uses a periodic inventory system Problem 6-3A Ziad Company had a beginning inventory on January 1 of 150 units of Product 4-18-15 at a cost of $20 per unit. During the year, the following purchases were m Mar. 15 400 units at $23 Sept. 4 350 units at $26 July 20 250 units at $24 Dec. 2 100 units at $29 1,000 units were sold. Ziad Company uses a periodic inventory system