Dollar Tree Inc reported a 2.6 percent fall in quarterly profit as costs increased.
Net income fell to $121.5 million, or 59 cents per share, in the second quarter ended Aug. 2 from $124.7 million, or $1.25 per share, a year earlier.
Revenue jumped 9.5 percent to $2.03 billion.
Same-store sales rose 4.5 percent on a constant-currency basis. Analysts on average had expected a 2.5 percent rise, according to research firm Consensus Metrix.
Dollar Tree, which operates the Dollar Tree, Deal$ and Dollar Bills stores, agreed to buy Family Dollar Stores Inc in July. The bid has since been trumped by Dollar General Corp.