I only need 20 RP Riot :/

I currently have 1445 RP and I would like to send a mystery gift to my brother because he's sent me so much stuff (and just about the only family member out of 6 that was nice to me) (also the current double bonus that is up for mystery skins is awesome) I would at least like to give him one in return. But when I go to give him one it will leave me with 955 RP and I know SSW Thresh comes out soon and I just absolutely love that skin and Thresh, he is my favorite support. I was wondering if you were able to do this and I would be oh so grateful <3