Determine the cost of inventory on December 31, 2017, using the perpetual inventory system and ea following inventory costing methods: A) First-in, first-out B) Last-in, first-out Weighted average (round weighted average cost per unit to two decimal places) etermine the cost of inventory on December 31,2017 , using the periodic inventory system an owing inventory costing methods: First-in, first-out Last-in, first-out Weighted average (round weighted average cost per unit to two decimal places) Determine the cost of inventory on December 31, 2017, using the perpetual inventory system and ea following inventory costing methods: A) First-in, first-out B) Last-in, first-out Weighted average (round weighted average cost per unit to two decimal places) etermine the cost of inventory on December 31,2017 , using the periodic inventory system an owing inventory costing methods: First-in, first-out Last-in, first-out Weighted average (round weighted average cost per unit to two decimal places)