Short SF story submissions

I still need to browse through my new science fiction novel The Silver Dart to clear up a few things early on in the novel.  I've been submitting short science fiction stories to Clarkes World.  The first one, Making Ends Meet was rejected.  I just now submitted Chances Are Slim.  They respond within three days and will pay ten cents a word if accepted.  It is very difficult to break into science fiction for publication as I've been trying for 39 years.  If I get an acceptance such as this I'll shout the news long and loud.