Provided Ubisoft hasn't changed its pricing model, then the Ash Elite skin will cost 1800 R6 Credits. However, if you've got the Year 5 Pass then this is reduced to 1,620 R6 Credits.

Rainbow Six Siege Chimera Issues: Missing Outbreak Packs, Operators, Ash Elite Skin A fix is on the way for the missing Ash skin. By Chris Pereira on March 8, 2018 at 4:00PM PST ...

As an elite skin, it’ll likely cost R6 Credits to obtain Although Ash already has two elite skin appearances, if anyone on Siege ’s roster of 52 is going to get a Lara Croft look, Ash is a ...