Hi,
Things to consider for you:
* PR00 is not a variant condition; in order to fulfill your requirement, your condition type's "Variant condition" field should be checked in V/06.
* Variant conditions' condition class should be surcharge (A); not price (B), as you can enter only one active price for an item.
* Recommended condition types are VA00 and VA01, check them please.
After considering the recommendations above, you'll need to create a ref. characteristics for variant conditions, create variants from VK30 and then create condition records for your requirement. Infırmation can be found on SCN: https://www.google.com.tr/search?q=variant+pricing&rlz=1C1VFKB_enTR666TR666&oq=variant+pricing&aqs=chrome..69i57j69i60j69i65l3j69i60.1879j0j7&sourceid=chrome&ie=UTF-8#q=variant+pricing+site:scn.sap.com