Santa Stocking Directions Help

I need some help in a pattern I’m working on. The directions say… Facing right side, sl last 13 sts onto a K needle, attach yarn, and P15. Is it possible the directions have a typo and it should say slop last 15 sts? Thanks for any help!

Do you have a link to the pattern or at least a name that you could provide?

I don’t have a link to the pattern, it was a kit that I bought. The name of the pattern is Christmas Classics. #501 Candide Old Fashioned knitted christmas stocking kits.

First off how many sts do you have on your needle?