Pattern help

OK I am making a sweater and I am shapping the arms and I am not sure what this one part means.

Shape Armholes
Cast off 3(3:4:4) sts at beg of next two rows.
[B][COLOR=green]Dec one st at each end of the next and 1(2:2:3) foll alt rows. 49(51:55:57) sts[/COLOR].[/B]

I get the bind off each row part I have problems with the green bolded part. Does it mean dec at each end of every other row two more times for a total of three times? ( I am doing the second largest size)

:cheering:yep you got it… They want you to decrease at the end of the next row and then again 2 more times… so for a total of 3 times… you should have 55sts left…