Adam Orvos
Executive Vice President and Chief Financial Officer at Ross Stores
Thank you, Barbara. As previously mentioned, comparable store sales rose 1% for the quarter on top of a 9% gain in the prior year. This slight increase was due to growth in the size of the average basket, as traffic was relatively flat compared to last year.
As Barbara discussed earlier, fourth quarter operating margin of 10.7% was up 90 basis points from 9.8% in 2021. Cost of goods sold grew 15 basis points versus last year due to a combination of factors. Distribution expenses rose 90 basis points, primarily due to timing of packaway-related costs and de-leverage from the opening of our Houston distribution center earlier in the year, while domestic freight and occupancy de-levered by 20 and 5 basis points respectively. Partially offsetting these cost was higher merchandise margin, which grew by 15 basis points as the benefit from lower ocean freight costs more than offset somewhat higher markdowns. Buying expenses also improved by 85 basis points due to lower incentive compensation.
SG&A for the period levered by 105 basis points, again primarily due to lower incentive expense. Now let's discuss our outlook for fiscal 2023. As Barbara noted in our press release, the macroeconomic and geopolitical environments remain highly uncertain, as a result, we believe it is prudent to remain conservative when planning our business. While we hope to do better for the 52 weeks ending January 27, 2024, we are planning comparable store sales to be relatively flat.
If sales perform in line with this plan, we expect earnings per share for 2023 to be in the range of $4.65 to $4.95 compared to $4.38 in fiscal 2022. It is important to note that fiscal 2023 is a 50 three week year. Incorporated in this guidance range is an estimated benefit to earnings per share of approximately $0.15 from the extra week.
Our guidance assumptions for the 2023 year include the following. Total sales are planned to grow by 2% to 5% for the 53 weeks ending February 3rd, 2024. Comparable store sales for the 52 weeks ending January 27, 2024 are planned to be relatively flat. Based on these sales plans, operating margin for the full year is expected to be in the range of 10.3% to 10.7%. This reflects the resetting of the baseline for incentive compensation, higher wages, the deleveraging effect on flattish same-store sales and lower freight costs. Also incorporated in this operating margin guidance is an estimated benefit of about 20 basis points from the 53rd week.
For 2023, we expect to open approximately 100 new locations, comprised of about 75 Ross and 25 dd's DISCOUNTS. As usual these openings do not include our plans to close or relocate about 10 older stores. Net interest income is estimated to be $115 million, depreciation and amortization expense, inclusive of stock based amortization is forecast to be about $570 million for the year.
The tax rate is projected to be about 24% to 25%, and diluted shares outstanding are expected to be approximately $339 million. In addition, capital expenditures for 2023 are planned to be approximately $810 million, as we make further investments in our stores, supply chain, and merchant processes to support our long-term growth and to increase efficiencies throughout the business.
Let's turn now to our guidance for the first quarter. Elevated inflation continues to impact our low to moderate income customer, as such, we are also planning comparable store sales to be relatively flat for the 13 weeks ending April 29, 2023. This compares to a 7% decrease and a 13% gain in the first quarters of 2022 and 2021 respectively. If sales perform in line with this plan, we expect earnings per share for the first quarter of 2023 to be $0.99 to $1.05 versus $0.97 last year.
The operating statement assumptions that support our first quarter guidance, include the following. Total sales are planned to be up 1% to 4% versus last year's first quarter. We would then expect first quarter operating margin to be 9.6% to 9.9% compared to 10.8% last year. The expected decline reflects the deleveraging effect if same-store sales perform in line with our plan, unfavorable timing of packaway-related costs and higher wages.
Further, merchandise margin is forecast to benefit from lower freight costs. We plan to add 19 new stores, consisting of 11 Ross and eight dd's DISCOUNTS during the period. Net interest income is estimated to be $28 million. Our tax rate is expected to be approximately 24% to 25%, and diluted shares are forecast to be about $341 million.
Now, I will turn the call back to Barbara Rentler for closing comments.