In 2 wks, I'm selling @ my very 1st craft show. I make & sell necklaces, $20/pc. How many should I have made?

It's a 2 day craft show and I've got a 10'x10' selling space. As of right now I've got 45 necklaces made. They are made primarily of gl beads with decorative beads to accent a main focal pendant. I've got a week and a 1/2 until this craft show. Should I make more? I have NO idea how these will sell and don't want to make too many or have not enough. Any ideas???