Final answer:
Adding a milk alternative would incur an extra charge similar to adding both creamer and sweetener to a cup of coffee in the example given. If the second add-on represents this milk alternative, then the customer would pay the base price plus an additional fee, which demonstrates a common pricing strategy in business.
Step-by-step explanation:
The question relates to the additional cost incurred when opting for a milk alternative as a drink base. In the context of the provided scenario, if we draw a parallel to the coffee shop pricing, adding a milk alternative would be similar to adding both creamer and sweetener to a cup of coffee. With the base coffee at $2, adding one of either creamer or sweetener would bring your total to $3. However, if you desired both add-ons, you'd face an extra charge of $1, making the total $4.
A milk alternative can be thought of as this second add-on, which means instead of just paying for the base (coffee), you would need to pay for the base plus an extra charge for the alternative milk option, just like paying for coffee, creamer, and sweetener altogether.
This type of pricing strategy, where customers pay additional fees for extra features or services, is often seen in various businesses, which was the case when Netflix customers encountered a 60% price hike to maintain their existing services back in 2011.