AutoZone has reported net sales for the financial year ended August 27, 2011 increased by 9.6% to $8.1bn (£5.2bn). Same-store sales rose by 6.3% while net income was up by 15% to $848m (£547m). Fourth quarter net sales climbed 8.1% to $2.6bn (£1.7bn) while same-store sales grew by 4.5%.