Everything is very simple:
1) Fill in the form for creating an ad and click on the “Post Ad” button
2) click the "Return to My Account" button on the bill page
3) in this way create all the ads you want to post on Perprice
4) marked all the ads (or only those that decided to pay) and click the "Publish" button in Your ads tab. This will create a bill for payment of all marked ads and it will be cheaper than when you pay for each ad separately.
The same system of discounts is applied when bulk uploading ads from Your account or if you have ordered the paid posting services for ads
Discount rate is HERE