User blog comment:Soul Quest/Question about TPA skins/@comment-3974211-20130528105429

You get 25% off the champion's RP price if you buy the bundle while lacking champions. For every TPA skin you already own, the price is reduced by 562 RP.

590 RP for Shen and 660 RP for Orianna, plus the total price (2812 RP) of the skins: 4,062 RP for your bundle.