Back:  Cast on 44 sts. and work in rib as follows:

Row 1 (RS) P 3, * K2, P2, rep from * end last 3 sts in P.

Row 2 K the knit sts and P the purl sts.  Continue in rub as established until piece measures 5 inches from beginning.

Shoulder shaping: Bind off 12 sts at beginning of next 2 rows.  Bind off remaining 20 sts for back of neck.

Front:  Work as for back until piece measures 3 inches from beginning.

Placket shaping: On RS work 21 sts, inc. 1 st in next st, join 2^nd ball of yarn, inc. 1 sts in next st, work to end.  Work both sides at once with separate balls of yard on keep 2 sts at neck edge in garter st and remaining sts in rib until same length as back to shoulder.  Shape shoulder as for back.  Bind off remaining 11 sts each side for neck.  Sew shoulders.

Sleeves:  Pick up and knit 20 sts around armhole on first row, then rib as for back until piece measures 2 ½ inches.  Bind off.

Finishing:  Block pieces.  Sew up sleeve and side seams, Single crochet around neck and make chain button loop on one side of placket.  Sew button on other side of placket.