There is usually a basket area on ecommerce websites - located op top right corner of the page. It's usually a basket/cart icon, sometimes with additional information. Customer asked us to add number of items in the basket there. Why does it make sense to display number of items in addition to the total price, that's already there?
In my oppinion it's confusing, because it's hard to display the number that customer is expecting. If you're buying one product it's 1, that's ok. If you're buying 3 pieces of one product, you would expect to see "3 items in basket". If you're is buying 3 different products you would expect to see "3 items" as well. But it would be unexpected to see "you have 5 items" if you had 3pcs and 2pcs (I would expect "2 items").
Generally I don't see much use of displaying number of items in addition to the total amount anyway. Most important information for me is whether it's empty or if there is something there. If I need to know more I go to the basket page.
What do you think?
Update: The request from our clients come through designers. Practically. The designer designed the cart with number of items, so we want number of items. Sometimes there is no price, only number of items. So at least sometimes it's not decision-driven, it's just because the designer drawn it so... Also: Biggest and (IMO) best czech ecommerce website Alza.cz (https://www.alzashop.com/, https://www.alza.de/) does not have it. Amazon shows only the number of items, not price.