I don't have the number at my fingertips, but it's pretty simple to cost going from 55% to 60%: it would raise the cost of every claim by five divided by fifty-five, or one-eleventh.
To underline the significance of taking the best 12 weeks, the reason I think that's important is that often in a period before a layoff a worker works on a reduced hours basis. It's through no fault of their own that their normal earnings are interrupted.
If you average over 26 weeks, a lot of workers who get laid off, whether it was that the employer was in trouble....
But I don't know what that would cost.