Fabric (cotton) in the US runs about $8.00/yard. Sometimes I stock up when I find a great sale. My custom skirts run $20 each. Even at that I'm not paying myself much for labor.
Vicki - Brighten up the pictures. Some of them are too dark. Also if you can get a model that can also help. I have been actively selling for a full year and have had 23 sales. I have probably given away as much as I've sold for model photos, fashion shows, charity auctions, etc.
The only other advice is to make treasuries. It gets your shop noticed by other sellers. Not everyone sews! Your dresses are cute but I agree that your prices are low. Check out other shops and the keywords they are using, tags, prices, etc. Good Luck! It takes time.
Here's one that could use better lighting.
http://www.etsy.com/listing/78153975/infant-toddler-girls-pillowcase-dress