Having some problems with this pattern as far as the decrease goes.
**dec 1 st at armhole edge on next and foil 2 alt rows at the same
time dec 1 st at front slope edge as set on every 3rd row from
previous dec. 29 sts.
Dec 1 st at front slope edge only on every foll 3rd row from previous
dec until 22 sts rem.
Cont straight until work meas 8Y2 in (22
So do I count the purl rows (alt) when determining every following 3rd row or does this just mean the pattern rows ?