public decimal Total()
{
var groupedItems = Items
.GroupBy(i => i.Sku)
.Select(g => new
{
Sku = g.Key,
Count = g.Count()
});
decimal total = 0m;
foreach (var line in groupedItems)
{
var specialOffer = _specialOffersRepository?.GetSpecialOfferBySku(line.Sku);
if (specialOffer != null)
{
total += line.Count / specialOffer.Quantity * specialOffer.OfferPrice + line.Count % specialOffer.Quantity * _itemsRepository.GetProductBySku(line.Sku).UnitPrice;
}
else
{
total += line.Count * _itemsRepository.GetProductBySku(line.Sku).UnitPrice;
}
}
return(total);
}