Help with instructions

My instructions are for a sweater and this is for shaping the armhole, confused!!! the instructions read 1st row - PAT across 14 sts. Cast off 16 sts loosely. PAT across 8 sts Place marker at end of row. 2nd row- (this is where I am having a problem) Cast on 16 sts over cast off sts. PAT to end of row. How do I cast on over cast off sts? :??

Just use any one-strand cast-on method–backward loop, knitted cast on. It will leave a space between where you bound off and where you cast on, which is the idea. There are videos on different cast-on methods via the above link.