Be careful buying with Kohl's Cash and then returning. Last time I used Kohl's Cash in the store they told me that if you return something you bought with Kohl's Cash, you don't get anything back for the amount of the Kohl's Cash (ie. you buy a pan for $50, use $20 KC, and pay $30. If you returned the pan, you would only get $30 back).
That was my understanding too. I returned a sweatshirt that I bought DS w/$20 KC. I didn't show my receipt. I got $16 on a store credit but I was ok with that. People were doing this repeatedly and saving their KC for a big purchase. It wasn't intended to be used that way.
It's like if you buy something at Target for $20 w/a $10 coupon. If you return it you only get $10 back. Kohl's didn't used to be this way but they are now. You should only use KC on stuff you want to keep.