With RS facing, k across 14 (16, 18) sts.
Join 2 more balls of yarns.
Cast off 8 sts for neck.
K 14 (16, 18)sts.
Working both sides at the same time, dec 1 st at each neck edge on the next 4 rows - 10 (12, 14) sts on each shoulder.
Continue to work in st st until piece measures same as back to cast off edge.
Ok, I get the first part about knitting across the rows but I don't understand the whole joining another ball of yarn thing that sweaters require me to do. This pattern calls for using two strands of yarn so I get the "join two balls" thing because I'm using two balls for it, but I can't conceive in my little pea brain the whole idea of where the heck I join this yarn?! If I'm knitting along there is no area to just join another ball, right? I'm knitting along and I'm assuming "cast off" means take the stitches off the needle onto another needle. How does that leave an open end for me to join this? Or am I just being a complete dope?