The 'Prices shown in' option is only intended to provide you with an approximation of the cost of your order in the currency you selected. Only the New Zealand dollar (NZD) option gives you an exact amount. This is because all orders are charged in New Zealand dollars only. If you have choose to have your order displayed in a currency other than the New Zealand dollar then the current total for your order in NZ dollars is shown beneath the total listed for your order on the checkout page of the shopping cart.

I selected a currency other than the New Zealand dollar when I was shopping but my credit card was charged in New Zealand dollars. Why is this?