comp-store sale
n.— «“If you shrink portion sizes, you kind of have to reduce prices,” said John Glass, an analyst at CIBC World Markets. “A lower check drags down comp-store sales. What you hope is, you offset the check with higher traffic.”» —“Will Diners Still Swallow This?” by Andrew Martin New York Times Mar. 25, 2007. (source: Double-Tongued Dictionary)