Margin maintenance problem on kaplan notes

hey everybody, i’m curious why the margin required for position back to initial margin is not 9500-4500=5000 ? according to the notes, the number is 4500 instead.

It’s $5,000 - they’ve just made a mistake.

5 * 5000 * -0.2 = -5000
9500 - 5000 = $4500
therefore $5000 is needed to bring back to $9500

all right, thx for your reply!!