Metlock, Inc. had a beginning inventory on January 1 of 135 units of Product 4-18-15 at a cost of $21 per unit. During the year, the following purchases were made. Mar. 15 July 20 360 units at $24 225 units at $25 Sept. 4 315 units Dec. 2 90 units at $27 at $30 900 units were sold. Metlock, Inc. uses a periodic inventory system. Metlock, Inc. had a beginning inventory on January 1 of 135 units of Product 4-18-15 at a cost of $21 per unit. During the year, the following purchases were made. Mar. 15 July 20 360 units at $24 225 units at $25 Sept. 4 315 units Dec. 2 90 units at $27 at $30 900 units were sold. Metlock, Inc. uses a periodic inventory system