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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2018 | May 31, 2017 | May 31, 2018 | May 31, 2017
Revenues: |  |  |  |
Net merchandise sales | $ 750,473 | $ 710,699 | $ 2,312,447 | $ 2,199,051
Export sales | 9,967 | 6,475 | 27,252 | 25,381
Membership income | 12,852 | 12,038 | 37,930 | 35,581
Other revenue and income | 8,909 | 1,046 | 11,207 | 3,113
Total revenues | 782,201 | 730,258 | 2,388,836 | 2,263,126
Cost of goods sold: |  |  |  |
Net merchandise sales | 641,249 | 611,455 | 1,977,840 | 1,879,747
Export sales | 9,466 | 6,143 | 25,900 | 24,085
Non-merchandise | 1,979 |  | 1,979 |
Selling, general and administrative: |  |  |  |
Warehouse club and other operations | 76,259 | 67,754 | 217,712 | 200,964
General and administrative | 24,079 | 16,907 | 63,167 | 51,921
Pre-opening expenses | 352 | 9 | 863 | (104)
Asset impairment |  |  | 1,929 |
Loss/(gain) on disposal of assets | 388 | 364 | 587 | 1,106
Total operating expenses | 753,772 | 702,632 | 2,289,977 | 2,157,719
Operating income | 28,429 | 27,626 | 98,859 | 105,407
Other income (expense): |  |  |  |
Interest income | 370 | 392 | 1,138 | 1,443
Interest expense | (1,362) | (1,828) | (3,609) | (5,126)
Other income (expense), net | (575) | 1,101 | (87) | 1,088
Total other income (expense) | (1,567) | (335) | (2,558) | (2,595)
Income before provision for income taxes and income (loss) of unconsolidated affiliates | 26,862 | 27,291 | 96,301 | 102,812
Provision for income taxes | (8,128) | (8,459) | (40,950) | (31,885)
Income (loss) of unconsolidated affiliates | (18) | 6 | 3 | (1)
Net income | 18,716 | 18,838 | 55,354 | 70,926
Less: net income (loss) attributable to noncontrolling interest | 22 |  | 22 |
Net income attributable to PriceSmart, Inc. | $ 18,694 | $ 18,838 | $ 55,332 | $ 70,926
Net income attributable to PriceSmart Inc. per share available for distribution: |  |  |  |
Basic | $ 0.61 | $ 0.62 | $ 1.82 | $ 2.34
Diluted | $ 0.61 | $ 0.62 | $ 1.82 | $ 2.34
Shares used in per share computations: |  |  |  |
Basic | 30,137 | 30,043 | 30,105 | 30,010
Diluted | 30,137 | 30,045 | 30,105 | 30,014
Dividends per share |  |  | $ 0.70 | $ 0.70

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1448-109256 + Details
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Period Type: | duration