Calculate the inventory value from the following data using the weighted average cost method. The transactions took place in the order mentioned below.- Opening stock: 7 units at $7 per unit - Purchased 5 units at $6 per unit - Purchased 3 units at $5 per unit - Sold 14 units - Purchased 2 units at $9 per unit - Sold 1 unit. The ending inventory is closest to: a) $15.11 b) $16.18 c) $18.23