Knitted On Cast On

[Sheri]

I really feel stupid right now. I am working on a top down sweater. I just took stitches off a holder and they are all live stitches of course but I have to add yarn and do two knit on cast ons. It's a purl row. How do I do this?
Do I make a loop and knit one cast on from that and then purl back? But of course the loop won't be attached to the live stitches. Ok, I took two Vicaden for pain and my brain isn't firing real great .... duh