Incorrect total price.

[tetianakubrak]

1. Select conference ticket with promo
2. Click Pay by Card
3. Click Close button.
4. Click Back button.
5. Unselect conference and add promo.
6. Press Pay by Card (whorkshop ticket is selected)
7. Enter valid card number/cvv/exp date.
8. Close form.
9. Check tickets.
10. Click "If you didn't complete the purchase, you can again go to purchase form using link."
11. Check total price

Actual result:
Total price is 1200 UAH.

Expected result:
Total price should be 600 UAH .

Note:
In DB price for each ticket is 600 UAH.