Final answer:
To upsell a Root beer float, offer additional toppings or flavors, create combo deals, and highlight the unique taste and nostalgia of the float.
Step-by-step explanation:
To upsell a Root beer float, you can offer additional toppings or flavors to enhance the customer's experience. For example, you can suggest adding whipped cream, chocolate syrup, or sprinkles to the float.
Creating a combo deal with a burger or fries can also entice customers to choose the Root beer float as an add-on. Additionally, emphasizing the unique taste and nostalgia associated with Root beer floats can help increase sales.