Monarch Company uses a weighted-average perpetual inventory system and has the following purchases and 20 sales: anuary 1 20 units were purchased at si0 er unit 12 units were sold 18 units vere purchased at $11 per unit e30) nuary 12 anuary 20 0205.32 What is the value of cost of goods sold? Mutiple Choice $126 O $120 $278 o$398 $272