I substituted the stone washed xl with the roma, because it has almost twice the yardage, costs half the money and gets me the same gauge when working with a 5 mm hook (I’m a loose crocheter)

I had some yarn leftover from what I stated above, but not enough to complete another row.
I stopped one row short of finishing part 17. So If I wanted to do part 18 as well, I had to get more yarn than I had. Some rows use a ball worth of yarn, meaning I would need to get a lot more.