9.	Income Taxes

During interim reporting periods, the effective tax rate may be impacted by changes in the mix of forecasted income from the U.S. and foreign jurisdictions where the Company operates, by changes in tax rates within those jurisdictions, or by significant unusual or infrequent items that could change assumptions used in the calculation of the income tax provision.

The estimated effective tax rate was 57.4% and 38.6% for the three months ended October 27, 2018 and October 28, 2017, respectively. On December 22, 2017, the U.S. government enacted comprehensive tax legislation referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act significantly revised U.S. corporate income tax regulations including, among other things, lowering U.S. corporate income tax rates (from 34% for the three months ended October 28, 2017 to 21% for the three months ended October 27, 2018) and implementing a territorial tax system. As a result, pretax income from U.S. operations for the three months ended October 27, 2018 was taxed at that reduced rate. However, the pretax income from the Company’s foreign operations, mainly in South America, are now taxed at a rate higher than the U.S. statutory rate, which increased the overall effective tax rate. Additionally, with the small amount of worldwide pretax income for the three months ended October 27, 2018, permanent tax adjustments from foreign operations resulted in a significant increase in the estimated effective tax rate.