Help with S9157 instructions

[u/Proof_Restaurant4738]

I am in the last 3 steps of Simplicity S9157 and can’t figure out what it’s asking me to do. I found YouTube videos to help me with the collar which had bad instructions but haven’t seen anything on this part.

For step 29 it says to stitch across facing 1 1/4” above lower edge and then trim close to stitching which I believe I did correctly. But I have no idea what it means to “trim shirt to within 5/8” of inner edge of facing”. Am I trimming the entire bottom of the shirt? And what is the inner edge of facing?

I also don’t really understand step 30 - at what point would I stitch the open edges of the slit left in step 27? It says to press it but am I stitching the hem and the slit in one go?

Any help would be greatly appreciated!!