I brought it home and took my seam ripper to it. To change the look of this dress I simply removed the collar and sleeves. Here's the neat part. Most collars have a middle piece that connects to the dress. I ripped the stitches out that connect the collar to this middle piece. I then stitched the opening back up and what I had left was a neat little mission collar.
Finally, I cut the sleeves off and hemmed the raw edges to the inside. Now, I have a neat little summer/fall frock. I might even wear it to back to school night tonight.