Answer:
And the cost of play would be 1 with probability 1 for any given game. Then we can find the expected value like this:

And solving we got:

And then the best answer for this case would be:
$1.50
Explanation:
For this case we can calculate the expected value with this formula:

We assume that the standard deck is formed just with red and black cards. For this case we have the following info:
And the cost of play would be -1 with probability 1 for any given game. Then we can find the expected value like this:

And solving we got:

And then the best answer for this case would be:
$1.50