Question re VAT on app sales in UK

Please could someone with a company based in the UK let me know how the VAT/commission deduction works on app sales through Apple? If the customer pays £5.00 then is it as follows:

User pays = £5.00; 20% VAT deduction = 83p;  Net = £4.17;  30% commission to Apple on net of £4.17 = £1.25;  Net payment to developer = £2.92.

And does Apple provide a VAT statement on all sales too?

Thanks - can't work this out from the lengthy Paid Applications Agreement!