problem with price

hey,

when we add an product with a price for example 34,40€ the product price is right but when ordered and in cart he says 34,00 or 34€ how come the 0,40€ doesn’t count what to do now?

http://www.kim-lr.be/product/eau-de-parfum-boris-becker/
what options does we need to change to make it right?
thanks on advance! greets alex

http://ww.wp.xz.cn/extend/plugins/woocommerce/