Very cute bows!
Without looking at what anyone else has posted I would say go up $1 on the stacked bows, you are printing your own ribbon and that is a lot more work and more cost for supplies
The little korker I think you could easily get $3+ for.
and the flower sculpture I think $4 would still be a fair price
For my plain twisted I charge $2.50 for 2" and then $1 per inch from there....does that make sense?