*Customer Acquisition Cost*, or *CAC*, measures how much an the the organization spends to acquire new customers. CAC – an important business metric – is the total cost of sales and marketing efforts, as well as property or equipment needed to convince a customer to buy a product or service.

Look at the formula of the **CAC**:

If you look at the DataFrame we have, we make the following points:
  - We do have expenses in our DF - ``'cost'`` column
  - We also have the number of customers - the number of unique ``'customer_id'`` notes in the DF.


So, we are ready to count the **CAC**!

Choose the right formula to count the CAC metric. X - the number of new customers, Y - the number of old customers, Z - expenses.

This course will teach you the necessary skills to manage simple analytical tasks. You are going to learn Python and its libraries, such as pandas and NumPy. Besides, you will deal with real-life analytical tasks such as calculating vitally important marketing metrics.

Here, we will face challenges related to data types in python. In this section, we will learn the Python syntax necessary for each person who wants to work with this language. After the section, we will undoubtedly be able to cope with simple Python tasks.

This section will teach you simple Python functions. We will be able to work with if/else statements and loops. Such skills are necessary for everyone who wants to start programming and doing fascinating Python tasks.

This section is the most complicated than the previous one, but it is gripping. Here, we will manage the most commonly used pandas function to help we do essential operations with data. Also, we will learn the basics of the NumPy library.

This section allows you to become a real analyst. Let's go!

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