Usually layoffs have a one-time charge associated with closures and severance and other such payments (COBRA?).
But $230 million over 1,600 is $145k per person.
Block reportedly handed out a bunch of incentives to the people staying, could be similar to that.
I’d guess some of that is accounting for taxes on profit they’ll now have to pay that otherwise would have been deductible if spent on salaries for R&D?