Good afternoon. Joining me on our call today are Michael O'Sullivan, President and Chief Operating Officer; Gary Cribb, Group Executive Vice President, Stores and Loss Prevention; John Call, Executive Vice President, Finance and Legal; Michael Hartshorn, Executive Vice President and Chief Financial Officer; and Connie Kao, Vice President of Investor Relations.
We'll begin our call today with a review of our first quarter performance, followed by our outlook for the second quarter and fiscal year. Afterwards, we'll be happy to respond to any questions you may have.
As noted in today's press release, despite unfavorable weather throughout the period, we achieved above-planned growth in both sales and earnings in the first quarter.
Earnings per share for the 13 weeks ended May 5, 2018, were $1.11, up from $0.82 for the 13 weeks ended April 29, 2017.
Net earnings were $418 million, up from $321 million in the prior year. These earnings per share results include a $0.17 per share benefit from recently enacted tax legislation and a $0.02 per share benefit from the favorable timing of packaway-related costs that we expect to reverse in subsequent quarters.
Total sales for the quarter increased 9% to $3.6 billion. Comparable store sales for the 13 weeks ended May 5, 2018, rose 3% over the 13-week period ended May 6, 2017. This growth compares to a same-store sales gain of 3% for the 13 weeks ended April 29, 2017. We estimate that unfavorable weather throughout the quarter reduced our comparable store sales by over 1%.
For the first quarter, the strongest merchandise category at Ross was men's, while geographic trends were very broad-based when normalized for weather.
Operating margin for the period of 15.1% was down slightly from the prior year as an improvement in merchandise gross margins and favorable timing of packaway-related expenses were offset by higher freight costs and wage-related investments.
As we ended the first quarter, total consolidated inventories were up 19% over the prior year, mainly due to higher packaway levels as our buyers were able to take advantage of numerous opportunities in the marketplace.
Average in-store inventories were up 2% as planned due to an earlier Mother's Day this year. While packaway, as a percentage of total inventories, was 49% compared to 46% last year.
We are also pleased to report that dd's DISCOUNTS delivered another quarter of solid growth in sales and operating profits.
Our store expansion program is on schedule with the addition of 23 new Ross and 6 dd's DISCOUNTS locations in the first quarter. We remain on track to open a total of approximately 100 locations in 2018 comprised of 75 Ross and 25 dd's DISCOUNTS.
As usual, these numbers do not reflect our plans to close or relocate about 10 older stores.
Now Michael Hartshorn will provide further color on our first quarter results and details on our second quarter guidance.