Given:
Number of people = 6
Cost per person = $52
Let's find the cost per person if the number of people changes to 12.
Given that the number of people is inversely proportional to the cost per person, we have the equation:

Where, k represents the constant of proportionality, y represents the number of people and x represents the cost per person.
Let's find the constant of proportionality k:

The constant of proportionality, k is 312
To find the cost when number of people changes to 12, we have:

Therefore, when the number of people changes to 12, the new cost is $26
ANSWER:
$26