Do you convert the price for each location / currency to a round number, or do you keep it as a straight conversion? E.g. Picking a $15 USD plan in the UK woul

Do you convert the price for each location / currency to a round number, or do you keep it as a straight conversion? E.g. Picking a $15 USD plan in the UK would bill me for £10.80, and fluctuate each month.