So, I get both sides and the sleeves done and run out of yarn. I'd known at an intellectual level that garter stitch eats yarn but now I can say from experience, Holy Crap, garter stitch eats yarn!
That's okay. I own a yarn shop. I'll order more. Until I get the order and my yarn's not there. Next to it on the invoice is the word DISCONTINUED! Discontinued?! Are you kidding me? Cascade never discontinues anything and now they've discontinued the one yarn that I need two more skeins of the finish my sweater?!!
Okay, okay, time for plan B. Fortunately, I had some of the Silk Garden left over so I did the collar with that.
I also had set aside a skein of another color that was really, really close. I decided to just let it be close and do the edging with that. I crocheted the edging too since the applied I-cord it called for sounded like one skein wouldn't make it.
Two rows of single crochet later, I put the zipper in and voila! 
BTW, they used buttons but I have been putting zippers in everything lately and loving it. No gaposis (you know when the space between your buttons gaps? I hate that)I'm very pleased with the result!
Thanks, Sarah, for taking the pictures!
As promised, here are the new spring yarns.
From left to right, we have Katia Bombay which is a sport weight, mercerized, self-stiping cotton. I got it to replace the discontinued Katia Jamaica which turned into Big Niece's Christmas dress. The next one is Bamboo Silk from Ella Rae. It is really soft and, according to Annie, has a great hand. (I'm making that Annie knit all the samples.) The last one is Sugar Rush. It is made with sugar cane! How fun is that?! It is very slippery and drapy but super shiny.