In this scenario, sales are the outcome being measured after different signage formats are used across store branches. Because sales depend on the conditions being studied, they are the dependent variable. The independent variable is the factor believed to influence the outcome, which here is the type of signage format. When an analysis compares mean sales under different conditions, the variable being observed for change is the dependent variable. This distinction is fundamental in experimental and comparative analysis. Although the terms ''target variable'' and ''criterion variable'' can appear in some analytical contexts, the standard and most appropriate term here is dependent variable because the study is evaluating whether the signage format affects sales performance. The question asks which type of variable the sales represent, and the answer is the one that identifies sales as the measured response to the change in treatment. Therefore, sales are the dependent variable because they reflect the result of the differing signage conditions across store locations.