Hi Brenda,
We described the process in an email to you, but wanted to respond here too, so that people with the same question have access to a quick answer.
To copy listings between shops you you will have to:
1 - add both shops to ShopShaper
2 - click "copy" on the right hand side of the listing. This will load the images etc of the listing you want to copy
3 - select the shop you want to copy the listing to and click either "list now" or "save as draft", as shown in the attached image.
As ShopShaper does not yet have variations support, that information will not get copied along.