Q2 2018Q1 2018Q4 2017Q3 2017Q2 2017
Restaurant-level operating margin18.5%17.4%16.6%16.7%19.9%
Restaurant-level operating margin growth (bps)-135-239-74-301-186
Operating margin6.8%3.9%5.7%4.5%7.8%
Operating margin growth (bps)-103-352222-333-169
Net profit margin6.1%3.4%16.5%3.5%5.6%
Net profit margin growth (bps)43-1841,359-191-93

Notes:Restaurant-level operating margin represents restaurant-level operating income, which equals company-operated restaurants sales minus company-operated restaurant costs, which includes cost of goods sold (food, beverage and packaging), labor, occupancy and other operating costs, expressed as a % of company-operated restaurant sales