I've paid $980 in 2019 for my wife, my 3 kids (<18yo) and I. I've actually no idea how I got this wrong since they don't publish the prices of the past years.
update: Thanks to archive.org (
https://web.archive.org/web/20190901000000*/https://www.cic.gc.ca/english/information/fees/fees.asp), I'm managed to figure out what happened. I just paid the "Right of Permanent residence fee", I didn't realize they were something else to pay. Anyway. I don't think this mistake justify to cancel the whole application and with a clear communication from their side I would have fixed that immediately. I started the CSQ in 2018-12. Now I've to redo everything.