The higher price sets a mental reference point, making the $18 option seem more reasonable even if its actual value hasn't changed. If $18 is shown alone, people evaluate it without comparison, so it may feel neutral or slightly expensive depending on expectations. In pricing layout, order shapes perception more than absolute cost. This is similar to how voice query SEO relies on context signals: user phrasing influences perceived clarity. Seeing structured options first guides interpretation of what is "normal." Designers can use this to nudge decisions and improve conversion by controlling comparisons.