Which pricing strategy in grocery stores is known as 'charm pricing' and has been proven to significantly increase sales of food products?

Grocery retailers employ numerous psychological pricing strategies to influence consumer purchasing behaviors. From strategic product placement to carefully calibrated price points, these tactics subtly guide our shopping decisions. How well do you understand the psychology behind the price tags you see in food retail? Test your knowledge of this fascinating intersection of food retail pricing strategy and consumer psychology!

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Prices ending in .99 or .95 (e.g., $3.99 instead of $4.00)
Buy-one-get-one-free offers on perishable items
Bundling complementary food products at a single price point
Setting prices higher than competitors but offering loyalty points