Why wouldn't it be safe? The point of a cwe is to remove the tylenol, and just end up with codeine, so if you do it correctly sure, 60mg of codeine isn't that high at all.
Also, are those the ones with 500mg of tylenol? If so you'd probably be fine just taking them as normal, and no need to do a cwe. It's not really that high a dose, and you won't lose any codeine in the process.