The following is the translation of the 'Bahasa' text to 'English' while preserving any html tags: "Prices ending in the number 9, which are often found in retail products, food, electronics, clothing, and others. This method is one of the sales strategies to increase sales by influencing consumers."

he translation of the given text from 'Bahasa' to 'English' while preserving any HTML tags is as follows: The increase in sales can be achieved by playing with the selling price in accordance with the psychology of the buyer, or famously known as 'psychological pricing'. This means that business owners or entrepreneurs strategically set the prices of their products in order to elicit an emotional response from customers and drive sales

One of the most commonly done is 'Buy One Get One Free'. In this way, sellers can quickly attract the shopping desires of the community.

There is also a strategy that applies the opposite of numbers ending in 9, namely by rounding up the numbers. For example, the production cost of goods being sold is Rp111,500, then the seller increases it to Rp150,000.

In the study, researchers conducted an experiment by selling wine priced at US$40.00, US$39.72, or US$40.28. The result showed that more people bought the wine priced at US$40.00.