simple cast on question

[spotlessdream]

I knew it would be way easier to ask you all than searching google for the writer, but I got the general idea of the pattern, which its a cute mock cable, but it doesn't say how many to cast on.. it just says multiples of 10.. so I can only assume that means cast on 10,20,30, etc.. to my desire?  I tried to be smart about this and added the number of stitches and they either came out to 8 or 10 so that wasn't so genius either.

Sorry to ask, but this really is the best and most helpful group ever.

http://www.knittingonthenet.com/stitches/mockcable.htm

Multiple of 10
Row 1: p4, k1, p1, k4
Row 2: p3, k2, p2, k3
Row 3: p2, k2, p1, k1, p2, k2
Row 4: p1, k2, p2, k2, p2, k1
Row 5: k2, p3, k3, p2
Row 6: k1, p4, k4, p1 Rep Rows 1-6.