What happens if I send a slightly different amount?

It's okay, your contract will see the amount that came, and if it is slightly different, it will automatically recalculate the amount of cryptocurrency to be sent to you at the rate set to you in the contract.

Often this happens, because cryptowallets often either withhold the amount of Commission in the total amount, or Vice versa is added.

You can safely send you a convenient amount, recalculation will happen automatically.