public double GetSalesPrice(double qty, Product product, string unit)
{
double qtyInProductUnit = 0;
switch (unit)
{
case "kg":
qtyInProductUnit = mu.ConvertFromKilograms(qty, product.GetUnit());
break;
case "g":
qtyInProductUnit = mu.ConvertFromGrams(qty, product.GetUnit());
break;
case "lb":
qtyInProductUnit = mu.ConvertFromLBs(qty, product.GetUnit());
break;
case "oz":
qtyInProductUnit = mu.ConvertFromOunces(qty, product.GetUnit());
break;
}
return(qtyInProductUnit * product.GetPrice());
}