@OP
If you buy 4 packages of 250 coins, you pay 0.04BTC. On the other hand, if you buy 1000 coins in bulk, you end up paying 0.05BTC
Perhaps you should rectify numbers in order to make the numbers consistent. I am sure you strive for perfection, as stated in the ANN.
Good luck for the project.
thanks for pointing that out to us we will re work it all out that was a mistake on our part