2018

2017

(in millions, except per share amounts)

First Quarter Ended March 31

Net sales

$

1,176.9

$

1,102.1

Gross profit

937.0

897.5

Net income

82.1

85.2

Earnings per share:

Basic

$

0.57

$

0.51

Diluted

$

0.54

$

0.49

Second Quarter Ended June 30

Net sales

$

1,285.5

$

1,146.9

Gross profit

1,050.1

928.1

Net income

94.4

137.6

Earnings per share:

Basic

$

0.66

$

0.84

Diluted

$

0.62

$

0.81

Third Quarter Ended September 30

Net sales

$

1,242.8

$

1,085.4

Gross profit

1,024.7

870.0

Net income

71.2

54.5

Earnings per share:

Basic

$

0.52

$

0.34

Diluted

$

0.49

$

0.33

Fourth Quarter Ended December 31(1)

Net sales

$

1,186.6

$

1,093.3

Gross profit

960.7

883.5

Net income (loss)

48.9

(63.4

)

Earnings (loss) per share:

Basic

$

0.36

$

(0.43

)

Diluted

$

0.34

$

(0.43

)

(1)

The fourth quarters of both 2018 and 2017 include the impact of U.S. Tax Reform enacted during the fourth quarter of 2017, as described further in Note 12, Income Taxes.