I'm not figuring it out. It seems to me that for every 4 sts in the row, you will have 5 once you do your inc. and after you subtract for the 11 ribbed sts ea end, it's not divisible by 4. Of course math and I often agree to disagree. Is the pattern online? Maybe there are corrections?
Denial, anger, bargaining, depression, acceptance...the five stages of frogging.