public virtual decimal GetTotal(IProductOrder item)
{
int units = item.GetUnits();
decimal unitPrice = item.GetUnitPrice();
return(units * unitPrice);
}
public override decimal GetTotal(IProductOrder item)
{
var regularPrice = base.GetTotal(item);
decimal volumeDiscount = 0;
int units = item.GetUnits();
decimal unitPrice = item.GetUnitPrice();
if (units >= _volumeThreshold)
{
volumeDiscount = _volumeThreshold * unitPrice - _volumePrice;
int multiplyDiscount = units / _volumeThreshold;
//Handle if volumeThreshold is 3 and units are 6 then the discount should be applied twice
if (multiplyDiscount > 1)
{
volumeDiscount *= multiplyDiscount;
}
}
return(regularPrice - volumeDiscount);
}