I would look here at my example. I haven’t put into practice yet but there are ways to avoid this and actually make more money if the stars align starting on 4-15. We loaded FBA up the week before March 1st on purpose to let the dust settle / take the biggest advantage of the rebates which are also now gone.
If your products aren’t large, and you do decent volume, you can work this with just a little more work on your end.