Fix all grammar mistakes in the given text:
To sum up, shopping is not always an enjoyable thing, because it takes time, it is often full of people and a person can be annoyed quickly by incompetent assistants, who eager to help you by suggesting the most expensive products.
To sum up, shopping is not always an enjoyable thing, because it takes time, the shops are often full of people, and a person can be annoyed quickly by incompetent assistants eager to help you by suggesting the most expensive products.