知識社|超市篇02|點解超市貨品價格有些沒有整數? | Knowledge Society Supermarket 02 | Why Do Supermarket Prices Often Avoid Round Numbers? 你有冇留意,超市貨架上好多價格都唔係整數,例如 $9.99、$19.90、$29.95?明明只差幾個仙,點解零售商唔直接寫成 $10、$20、$30?原來價格尾數背後,有一套幾有趣嘅消費心理。 Have you…