Q1 2018Q4 2017Q3 2017Q2 2017Q1 2017
Restaurant-level operating margin17.4%16.6%16.7%19.9%19.8%
Restaurant-level operating margin growth (bps)-239-74-301-186-134
Operating margin3.9%5.7%4.5%7.8%7.4%
Operating margin growth (bps)-352222-333-169-88
Net profit margin3.4%16.5%3.5%5.6%5.2%
Net profit margin growth (bps)-1841,359-191-93-57

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