Given the following events, what is the per-unit value of ending inventory on November 30 if this company uses a weighted-average perpetual inventory system?
- November 1: 5 units were purchased at $6 per unit.
- November 12: 10 units were purchased at $7.50 per unit.
- November 14: 7 units were sold for $14 per unit.
- November 24: 12 units were purchased at $10 per unit.