Cansela Corporation uses a periodic system and the company began 2016 with inventory of 8.200 units of its only product. The beginning inventory balance of $124,600 consisted of the following layers: 3,700 units at $13 per unit 48,100 4,500 units at $17 per unit 76,500 $124,600 During the three years 2016-2018 the cost of inventory remained constant at $19 per unit Unit purchases and sales during these years were as follows Purchases Sales 2016 35,500 37,500 2017 47.000 49.500 37,500 39,000 2018 Required: 1. Calculate cost of goods sold for 2016. 2017 and 2018. Cost o 2016 2017 2018