Here's where we stopped:
Continue in pattern stitch for 27 more rounds, ending with row 3.
You should have a total of 6 purled "ridges" and be at your beginning-of-round marker. This is the left underarm of the finished sweater.
Bind off two stitches, work across next 40 stitches in pattern as established. Place these 40 stitches on waste yarn or on a spare double point needle. They will be used later for the front of the sweater.
Bind off two stitches (right underarm) and work across the remaining 40 stitches, keeping pattern as established.
NOTE - To center the pattern on the top of the sweater, the two bound-off stitches at each underarm should be the "Purl 2" stitches of the pattern. Both 40-stitch sections, front and back, should begin and end with the "Knit 4" stitches of the pattern.