How much are the peaches?

Buying items at a shop is a very important thing for beginners to learn.

怎么卖 is the same as 多少钱. Both are asking “How much?”.

斤 is a Chinese measurement of weight equivalent to half a kilogram.

桃子怎么卖？

小明：老板，请问桃子怎么卖？

老板：桃子18块一斤。

小明：桃子新鲜吗？

老板：刚从树上摘下来的，很新鲜，很甜。

小明：那我要这些，您看多少钱？

老板：26块。

小明：给您30。

老板：好的，找你四块钱。