a grocery store advertised a detergent today for $7.99. why did the store choose to advertise the detergent…

a grocery store advertised a detergent today for $7.99. why did the store choose to advertise the detergent this way? it is trying to differentiate it from other brands. the store has a shortage of that detergent. customers brains tend to notice the last digit first. it wants to encourage customers to donate an extra penny to charity.
Answer
Brief Explanations:
This is a marketing - related question. In marketing, the strategy of using prices like $7.99 instead of $8.00 is based on the psychological phenomenon that customers' brains tend to notice the first digit first. When seeing $7.99, customers may initially process the price as being in the $7 range rather than the $8 range, which can make the product seem more affordable.
Answer:
Customers' brains tend to notice the first digit first.