Under the periodic inventory system, Village Fabrics purchases navy plaid fabric used in its fabric-selling business in the following lots: June 5 ? 4 yards at $2.50 per yard; June 12 ? 7 yards at $3.00 per yard; June 17 ? 8 yards at $3.50 per yard. What is the periodic average cost of the fabric per yard? (A) $3.11 per yard (B)$3.05 per yard (C)$2.50 per yard (D) $3.00 per yard