Q2 2018Q1 2018Q4 2017Q3 2017Q2 2017
Same-store sales growth6.5%3.0%3.6%0.9%1.3%
Same-store transaction growth6.4%3.7%3.2%1.4%2.1%
Same-store avg transaction value growth0.1%-0.6%0.4%-0.5%-0.7%
Same-store units per transaction growthN/AN/AN/AN/AN/A
Same-store selling price per unit growthN/AN/AN/AN/AN/A

Notes:Same-store sales, referred to by the company as "comparable sales," includes sales from stores for more than 13 months and ecommerce sales