Error in Paid Downloads...

Hi,

bought this really nice component and found a error.

If i want my article price to be 2.99€ i enter Net Amount: 2.51 and Tax (Percentage): 19

This should be 2.99€ so far but instead it raises an error - Payment was not correct (amount/currency)

If i try it with Net Amount: 2.50 and Tax (Percentage): 19 what is 2.98€ everything wents fine. Think there is an calculation error.

Hopefully anyone has a suggestion or even better a fix

Thank you!