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public double UnitTotalPriceIncludingOptions(int index)
{
    string culture = DocumentContext.CurrentDocument.DocumentCulture;
    //Australia
    ShoppingCartInfo cart = ECommerceContext.CurrentShoppingCart;
     if (culture.ToLower() == "en-au")
    {
        ShoppingCartItemInfo cartInfo = cart.CartItems[index];
        return cartInfo.UnitTotalPriceIncludingOptions;
    }
    else {
        //New Zealand
        ShoppingCartItemInfo cartInfo = cart.CartItems[index];
        var itemName = cartInfo.SKU.SKUName;
        var itemGuid = cartInfo.SKU.SKUGUID;
        var price = ValidationHelper.GetDouble(cartInfo.SKU.GetValue("SKUennzPrice"),0);
        var discount = ValidationHelper.GetDouble(cartInfo.SKU.GetValue("SKUennzPriceDiscount"),0);
        var realPrice = price - discount;
        double discountPrice = double.Parse(realPrice.ToString());
        return discountPrice;
    }
}

public string getCurencybyCulture()
{
string DomainName = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority).Replace("http://","").Replace("https://","");
SiteDomainAliasInfo Alias = SiteDomainAliasInfoProvider.GetSiteDomainAliasInfo(DomainName, SiteContext.CurrentSiteID);

string culture = (Alias != null) ? Alias.SiteDefaultVisitorCulture : SiteContext.CurrentSite.DefaultVisitorCulture;
   return BO_Helper.getCurencybyCulture(culture);

}


*BO_Helper.getCurencybyCulture()

public static string getCurencybyCulture(string culture)
{

    switch (culture.ToLower())
    {
        case "en-nz":
            return "NZ$";
           
        default:
            return "A$";
    }

}