Wrong rounding + WooCommerce COD Advanced

Hello, I have two things I would need to solve.

1) Rounding – I have two currencies, main one is CZK and second one EUR with the rate 0.037 (which is 27 CZK for one EUR). So far it is ok, but I need to change rounding of the prices – I need to round up all prices, is there any way how to globally set it? Or where to change it in the code? Problem is for instance with shipping – in CZK I have 39 CZK shipping, but in EUR I just see 1 EUR, which is quite bit different. So I would need all prices to be rounded always up.

2) I would need some assistance with WooCommerce COD Advanced plugin – I have set additional price for Cash on delivery, but of course this price is in CZK and not recalculated in the cart. So when in CZK, I get 80 CZK in advance (which is ok) but in EUR I have 80 EUR, which is not. Is there any way how to fix this?

Thank you!!!