How do I calculate net margin?

Ross Stores IncConsolidated Balance Sheets($000, except share data)January 28, 2023AssetsCurrent AssetsCash and cash equivalents$4,551,876Accounts receivable145,694Merchandise inventory2,023,495Prepaid expenses and other183,654Total current assets6,904,719Property and EquipmentLand and buildings1,495,006Fixtures and equipment3,961,733Leasehold improvements1,433,647Construction-in-progress319,3197,209,705Less accumulated depreciation and amortization4,028,178Property and equipment, net3,181,527Operating lease assets3,098,134Other long-term assets232,083Total assets$13,416,463Liabilities and Stockholders EquityCurrent LiabilitiesAccounts payable$2,009,924Accrued expenses and other638,561Current operating lease liabilities655,976Accrued payroll and benefits279,710Income taxes payable52,075Total current liabilities3,636,246Long-term debt2,456,510Non-current operating lease liabilities2,593,961Other long-term liabilities224,104Deferred income taxes217,059Commitments and contingenciesStockholders EquityCommon stock, par value $0.01 per share3,428Authorized 1,000,000,000 sharesIssued and outstanding 342,753,000 and351,720,000 shares, respectivelyAdditional paid-in capital1,820,249Treasury stock-584,750Retained earnings3,049,656Total stockholders equity4,288,583Total liabilities and stockholders equity$13,416,463