Ah, I understand what you are saying now. So it would be:

Sale price | Cost (KD cost and in some cases postage).
£7.00 – (£4.30)= £2.70 for selling 1
£60.00 – (£5.32+[£4.30x5=£21.50]) = (£60.00 – £26.82) = £33.18 for selling 5
£11.00 – (£1.60+£4.30) = £5.10 for selling 1

Profit for selling 7 so far (5+1+1) so far: (2.70+33.18+5.10)= £40.98

:P Thanks