Best Buy beat first-quarter estimates for both the top and bottom lines. Digital-sales growth slowed versus a year ago. Shares fall more than 5%. The company reported online-sales growth of 12%, a slow-down from from last year's first-quarter growth of more than 22%. The consumer-electronics store reported earnings of $0.82 per share, beating the $0.75 expected from analysts surveyed by Bloomberg. Revenue of $9.1 billion topped the estimated $8.74 billion.