In retail pricing strategy, the 'Rule of 9s' (charm pricing) is widely used because research shows it increases sales. What percentage increase in sales can retailers typically expect when implementing this strategy compared to rounded prices?

Psychological pricing is a powerful strategy in retail that influences consumer perception and purchase decisions. One of the most well-known pricing tactics has been studied extensively by researchers in behavioral economics and has shown measurable impacts on sales across various retail categories. Test your knowledge about this common but fascinating pricing phenomenon that continues to shape modern retail strategy.

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Around 8-10% increase in sales
Around 24% increase in sales
Around 3-5% increase in sales
Around 15% increase in sales