They are going to withhold 15% of the normal rebate amount, which will then be reconciled at the end of the tax year. So, according to my DIY accounting, I'm expecting to pay 57.5% of what I would normally pay (because 15% of 50% is 7.5%). So I've paid the FDC lady 57.5% of the usual amount and we'll see how good my accounting was when she gets her paperwork back from the office.