Discount retailer Dollar Tree Inc. said Thursday its same-store sales and total sales were stronger than expected in the first quarter as customer traffic increased.

Dollar Tree said same-store sales, or sales at locations open at least one year, grew 9.2 percent in the fiscal first quarter. Its total sales rose 14 percent, to $1.2 billion from $1.05 billion. In February, the company said same-store sales would grow in the low- to mid-single digits, and total sales would be between $1.13 billion to $1.16 billion.

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