Buy any 2 Items and get 10% off both items

Hello all, Does anyone know how to automatically give 10% off 2 MIX and MATCH items of different retail prices? EX. scan item A @ 10.00 then scan item B at 20.00 at which point both items will be discounted 10% and so the total would be $27.00.

I can provide 10% off 2 items of the same price by setting DISCOUNT MIX and MATCH QTY 2 and UNIT PRICE say $9.00 (i.e. $10.00 dollar item for $9.00 10% off) but cannot link 2 differently priced items.

I noticed in a thread the RMS2.0 is capable of handling BUY X GET Y for say

Regards!