wrong price

Hello!

I hope I can explain this issue well: I have shipping costs €4 (taxes included) and €3.31 (without taxes), but in the cart and at checkout WooCoomerce adds 0.01 cents … I have tried to subtract one cent from shipping (€3.30), but it doesn’t work, it shows €3.99 (tax included) … Does it have to be this way? Is there a way to fix it, so it shows the correct amount?

Thank you for your help!
Best regards!
Patricia