Travis Marquette
Analyst · the SEC.
Now I'd like to turn the call over to Barbara Rentler, Chief Executive Officer
Thank you, Barbara. As Barbara mentioned earlier, earnings per share for the fourth quarter and fiscal 2019 year were $1.28 and $4.60, respectively. These results compare to the fourth quarter 2018 earnings per share of $1.20 and $4.26 for the year. As a reminder, our results for both the 2019 and 2018 fourth quarters and fiscal years reflect onetime noncash gains of $0.02 and $0.07 per share, respectively, primarily related to the favorable resolution of tax matters.
Now I'll discuss further details on our fourth quarter results. Our fourth quarter comparable store sales gain in the quarter was driven by a combination of higher traffic and an increase in the size of the average basket. Fourth quarter operating margin was 13.3% compared to 13.2% last year. Cost of goods sold increased 30 basis points in the quarter, mainly from higher distribution costs of 45 basis points due to unfavorable timing of packaway-related expenses and higher wages.
Merchandise margin declined 5 basis points, reflecting some pressure from tariffs. These higher expenses were partially offset by 10 basis points of lower buying costs, while freight and occupancy levered by 5 basis points each.
SG&A for the quarter levered by 40 basis points, primarily due to lower incentive bonus and lower other miscellaneous costs.
During the quarter, we repurchased 2.7 million shares of common stock for a total purchase price of $309 million. For the full year, we repurchased 12.3 million shares for an aggregate price of $1.275 billion.
Now let's discuss our outlook for 2020. As noted in our press release, our guidance does not reflect the potential unknown impact from the evolving coronavirus outbreak. While we're closely monitoring the situation, there remains a high level of uncertainty over supply chain disruptions in China. In addition, it is unclear how a further possible spread of the coronavirus could negatively impact U.S. consumer demand.
For the 52 weeks ending January 30, 2021, we are forecasting earnings per share to be $4.67 to $4.88, which includes ongoing pressure from tariffs. The operating statement assumptions for fiscal 2020 include the following: Total sales are projected to grow 4% to 5%. Comparable store sales are expected to increase 1% to 2% on top of multiple years of strong gains. We plan to add about 100 stores this year, consisting of approximately 75 Ross and 25 dd's DISCOUNTS locations. As usual, these numbers do not reflect our plans to close or relocate about 10 older stores.
We project that operating margin for 2020 will be in the range of 13.0% to 13.2% compared to 13.4% in 2019. The forecasted decline reflects our plans for merchandise gross margin pressure from ongoing tariffs and some deleveraging of expenses if same-store sales only increase 1% to 2%.
Net interest income is estimated to be about $8 million. Our tax rate is projected to be approximately 24%. We expect average diluted shares outstanding to be about $351 million. Capital expenditures for 2020 are projected to be approximately $730 million, which includes investments for our next distribution center. And depreciation and amortization expense, inclusive of stock-based amortization, is forecasted to be about $490 million.
Let's now move to our first quarter guidance. We are forecasting comparable store sales to be up 1% to 2%. Earnings per share are projected to be $1.16 to $1.21 versus $1.15 for the first quarter ended May 4, 2019.
Other assumptions that support our first quarter guidance include the following: total sales are planned to increase 4% to 5%. We expect to open 21 Ross and 7 dd's DISCOUNTS locations during the period.
First quarter operating margin is projected to be 13.6% to 13.8% versus last year's 14.1%. This forecast reflects our expectation for some pressure on merchandise gross margin from the previously mentioned tariffs, along with deleveraging on occupancy and other expenses on a comparable sales increase of 1% to 2%.
Net interest income is estimated to be about $2 million. Our tax rate is expected to be approximately 23%.
And finally, weighted average diluted shares outstanding are projected to be around 355 million.
Now I'll turn the call back to Barbara for closing comments.