Number of consumers over 40 years who preferred at least one drink is 

Let's tabulate all the information from the given table:

The calculation is as follows:

Consider the male 18 - 25 range:

=> Total consumers = 600

=> Out of them, 240 like A, 180 like B, 90 like both

=> Number of people who like either = 240 + 180 - 90 = 330

=> 600 - 330 = 270 people don't like any of the drinks.

Doing the same calculation for all the categories and tabulating, we get:

In the 41-60 category: The number of consumers who preferred either of the two drinks = 420 + 360 = 780.