He does grant the cashier a polite nod, almost before Lily nudges him to acknowledge the woman. Just because not showing much emotion is the path Regulus has chosen for this experience doesn't mean he's forgotten his manners entirely.

"It looks like all the fruits and vegetables are over there," he says, pointing to the right. And if those wall displays are doing the equivalent work of cooling charms, he'd bet the meat and dairy will likewise be along the walls. "Should we start there, or come to it at the end?"