It costs the same whether you submit one, two, three degrees (I submitted 2 that's why I know this). So if you are going to submit your high school qualification then you might as well try to get points for the uncompleted university degree, it won't cost extra. That said i agree with what other people said, you probably won't get credit for it as for all degrees WES asks for you to send your graduation diploma, which you don't have.