What is the primary psychological reason why retailers price products at $9.99 instead of $10.00?

Pricing strategies significantly influence consumer behavior and purchase decisions. One of the most enduring pricing tactics in retail is the use of prices ending in .99 or .95. This psychological pricing technique has been employed across various industries for decades, but do you know the primary reason why retailers continue this practice in the digital age? Test your knowledge about this subtle yet powerful pricing strategy that shapes billions of transactions worldwide.

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Left-digit effect: Consumers focus on the first digit and perceive the price as significantly lower
Change minimization: Retailers want to reduce the amount of coins they need to handle in cash transactions
Accounting advantage: It creates more complex numbers that are harder for competitors to track in market research
Digital sorting benefit: Products appear first in price-sorted listings that filter by maximum price points