Thank you, Mary Winn. Good morning, and thank you all for joining us today. As we expected when we gave our first quarter outlook in March, the challenges of weather, the heightened competitive environment and the current economic environment continued to impact our sales. However, as we reported today, our first quarter sales performance proved to even be more challenging than anticipated.
As we said in March, as the weather normalized, our sales trends improved. We saw a turn in our business during April, even as we take into account the Easter shift. That momentum has continued quarter-to-date. In quarter 2, we are seeing strength across both our consumables and the non-consumable categories. The impact of the inclement weather across much of the country affected each first of the month in the quarter, typically the strongest sales week, so we essentially lost the opportunity for sales across the first of each month.
Although our sales performance was softer than we anticipated for the first quarter, there were several positive highlights. For example, in addition to the favorable impact of the Easter shift on the Easter-related sales, we saw an improvement in our comp sales trends across the store as we moved through April. Based on our current sales trends, I believe that we are starting to see our initiatives gain traction, albeit a little later than we had anticipated. David will provide more details on our financial results in a moment, but I want to share just a few highlights.
Our net sales increased 6.8% over last year to over $4.5 billion. Same-store sales grew 1.5%. We are pleased to report that both customer traffic and average ticket increased for the 25th consecutive quarter. As expected, April was stronger than February and March for several reasons, including the shift in timing of Easter. We had a very good Easter as we saw our sell-through rates increase significantly from prior years' Easter sales.
Our gross margin as a percentage of sales declined 57 basis points primarily due to the increase in the sales of lower-margin consumables, including tobacco and perishables, as a percentage of overall sales.
SG&A increased by 37 basis points, primarily the result of deleverage on rent and utility costs resulting in part from our same-store sales performance, as well as additional costs incurred due to the extreme winter weather.
Net income was $222 million. Earnings per diluted share was $0.72, at the low end of our guidance. We returned $800 million in cash to shareholders through the repurchase of 14.1 million shares of stock, bringing our total cash return to shareholders since the inception of our store (sic) [share] repurchase program in December of 2011 to $2.3 billion. We are maintaining our sales and earnings per share guidance for the year.
I'll talk more about our operating initiatives for 2014 in a moment, but now I'd like to turn the call over to David.