‘Total to Pay’ summary before you save the ad
It would be great to have the ‘Total to Pay’ information before save ad.
A frame detailing the amounts charged would be the most interesting. Included a field for promotional coupon input, providing to the user the 'Total to Pay' before saving the ad. This frame could be just above the save button.
Not to make major changes in the code, simply a small frame beside the save button with the information ‘Total to Pay’ already help a lot. So the user is aware before going to the payment screen. You need to gather all values, advert plan, additional images, additional characters, promotions, coupon etc.