Acme-Jones Company uses a weighted-average perpetual inventory system. July 2: 6 units were purchased at $13 per unit. July 18: 11 units were purchased at $15 per unit. July 29: 15 units were sold. July 31: 11 units were purchased at $15 per unit. What is the per-unit value of ending inventory on July 31? (Round the unit calculations to two decimal places and total cost calculations to the whole dollar.)