Do you mean will you have 28 rounds? 8 rounds of rib and 20 rounds of stockinette makes 28 rounds total. I'd say, yes, you'll have 28 rounds. How many stitches you'll have I don't know.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper