June - 2 session payment.

$320.00

No payment for short session on June 3rd because I mistook the time.
$160 for June 10th (no extra for the extra 30 mins ^ to make up for missed time in the first session).
No session June 17th - because you are traveling.
$160 for June 24th Session.

2 x $160 = $320

No payment for short session on June 3rd because I mistook the time.
$160 for June 10th (no extra for the extra 30 mins ^ to make up for missed time in the first session).
No session June 17th - because you are traveling.
$160 for June 24th Session.

2 x $160 = $320