Crochet help

The pattern reads

Back: Ch 69(73, 81, 85, 89, 93, 93).
Row 1 (RS): Working into back hump of the ch (see Project Stitches), sc into 2nd ch from hook, sc into each ch until end - 68(72, 80, 84, 88, 92, 92) sts. Work even in BP for first 2(3, 3, 4, 4, 4, 4) dc rows. 68(72, 80, 84, 88, 92, 92) lps/sts; 17(18, 20, 21, 22, 23, 23) broomstick clusters.
Armhole Shaping: Cont working in est pattern,

Can anyone tell mwe what (work even in BP)?

Thank you Lori

Its been quite some time since I have crocheted but I think it is referring to crocheting in the back post.
This is also a great site for crochet help )

That’s a great website.

It means to work in the back post. Starting from the back bring hook from back to front then to the back. Work even means do the DC for whatever number of sts you already have on the piece for whatever number of rows you want for the size.

Thank you