cable cast on in purl
I'm not a very good knitter, and I'm stuck. I'm in the middle of a sweater and need to cable cast on 24 stitches at the end of a row, leading me to the next stitches. The cast-on stitches will form the right underarm; this sweater is knit from the top down, and pretty much all in one piece. I've done cable cast on in knit, working from left to right--but this is in purl and from right to left, and I'm completely confused!