public static decimal CalculateBreakEven(DimensionContainer dimensionContainer, FeeCategory feeCategory, decimal purchasePrice, Func <decimal, decimal> funcShippingcost = null)
{
List <decimal> dimensions = new List <decimal>
{
dimensionContainer.Length,
dimensionContainer.Width,
dimensionContainer.Height,
}
.OrderByDescending(o => o)
.ToList();
decimal weight = dimensionContainer.Weight;
decimal longestSide = dimensions[0];
decimal medianSide = dimensions[1];
decimal shortestSide = dimensions[2];
ProductSizeTier productSizeTier = GetProductSize(longestSide, medianSide, shortestSide, weight);
// Shipping Cost to Amazon (estimate) = 0.72 * max(0.25, product weight)
decimal estimateShippingCostToAmazon = funcShippingcost != null
? funcShippingcost.Invoke(weight)
: c_costPerPoundToShip *Math.Max(0.25m, weight);
// Cost to get to AMZN = Base Price + Shipping Cost to Amazon (estimate)
decimal costToGetToAmazon = purchasePrice + estimateShippingCostToAmazon;
// Average Storage Fee = 1.2 * (Width/12) * (Length/12) * (Height/12)
// TODO: Update storage fee cost to update starting 3/1/2016: http://www.amazon.com/gp/help/customer/display.html?nodeId=201648210
decimal averageStorageFee = 1.2m * (longestSide / 12) * (medianSide / 12) * (shortestSide / 12);
// Need to use the Outbound Shipping Weight for calculating the weight fee.
decimal dimensionalWeight = CalculateDimensionalWeight(longestSide, medianSide, shortestSide);
decimal outboundShippingWeight = CalculateOutboundShippingWeight(weight, dimensionalWeight, productSizeTier);
// Size Fee => Multiply flat fee * ProductSizeTier
decimal sizeFee = GetSizeFee(productSizeTier);
decimal weightFee = GetWeightFee(productSizeTier, outboundShippingWeight);
decimal feeCategoryPercentage = GetCategoryFee(feeCategory);
// TODO: Implement the Zero Fee Fulfillment. Which applies to Small Standard-Size and Large Standard-Size. Price > $300, means no fulfillment fees.
// Break Even Price = (Cost to get to AMZN + Average Storage Fee + Size Fee + Weight Fee) / (1 - Category Fee Pct)
return((costToGetToAmazon + averageStorageFee + sizeFee + weightFee) / (1 - feeCategoryPercentage));
}
// Follow this documentation for fulfillment fees.
// http://www.amazon.com/gp/help/customer/display.html?nodeId=201648210
private static decimal GetSizeFee(ProductSizeTier productSizeTier)
{
decimal sizeFee;
// Each sizeFee contains both the "Order Handling" and "Pick & Pack per unit"
switch (productSizeTier)
{
case ProductSizeTier.SmallStandardSize:
sizeFee = 2.06m;
break;
case ProductSizeTier.LargeStandardSize:
sizeFee = 2.06m;
break;
case ProductSizeTier.SmallOversize:
sizeFee = 4.09m;
break;
case ProductSizeTier.MediumOversize:
sizeFee = 5.20m;
break;
case ProductSizeTier.LargeOversize:
sizeFee = 8.40m;
break;
case ProductSizeTier.SpecialOversize:
sizeFee = 10.53m;
break;
default:
sizeFee = 2.06m;
break;
}
return(sizeFee);
}
// How to calculate the Outbound Shipping Weight for the Weight Handling fee
// This is used to calculate the Weight Handling fee.
// https://www.amazon.com/gp/help/customer/display.html/ref=help_search_1-1?ie=UTF8&nodeId=201119410&qid=1448996314&sr=1-1#calc
private static decimal CalculateOutboundShippingWeight(decimal unitWeight, decimal dimensionalWeight, ProductSizeTier productSizeTier)
{
decimal outboundShippingWeight;
decimal packagingWeight;
if (productSizeTier == ProductSizeTier.SmallStandardSize || productSizeTier == ProductSizeTier.LargeStandardSize)
{
packagingWeight = 0.25m;
}
else if (productSizeTier == ProductSizeTier.SmallOversize || productSizeTier == ProductSizeTier.MediumOversize ||
productSizeTier == ProductSizeTier.LargeOversize || productSizeTier == ProductSizeTier.SpecialOversize)
{
packagingWeight = 1.00m;
}
else
{
// Default to ensure a value is set.
packagingWeight = 1.00m;
}
if (productSizeTier == ProductSizeTier.SmallStandardSize || productSizeTier == ProductSizeTier.LargeStandardSize)
{
if (unitWeight <= 1)
{
// 1 lb. or less.
outboundShippingWeight = unitWeight + packagingWeight;
}
else
{
// more than 1 lb.
outboundShippingWeight = Math.Max(unitWeight, dimensionalWeight) + packagingWeight;
}
}
else if (productSizeTier == ProductSizeTier.SmallOversize || productSizeTier == ProductSizeTier.MediumOversize || productSizeTier == ProductSizeTier.LargeOversize)
{
outboundShippingWeight = Math.Max(unitWeight, dimensionalWeight) + packagingWeight;
}
else if (productSizeTier == ProductSizeTier.SpecialOversize)
{
outboundShippingWeight = unitWeight + packagingWeight;
}
else
{
// Default.
outboundShippingWeight = Math.Max(unitWeight, dimensionalWeight) + packagingWeight;
}
// Round up to the nearest whole pound.
return(Math.Ceiling(outboundShippingWeight));
}
private static decimal GetWeightFee(ProductSizeTier productSizeTier, decimal weight)
{
decimal weightFee = 0.00m;
decimal weightCeiling = Math.Ceiling(weight);
switch (productSizeTier)
{
case ProductSizeTier.SmallStandardSize:
weightFee = weightCeiling * 0.50m;
break;
case ProductSizeTier.LargeStandardSize:
if (weightCeiling <= 1)
{
weightFee = 0.96m;
}
else
{
weightFee = 1.95m;
if (weightCeiling > 2)
{
weightFee += (weightCeiling - 2) * 0.39m;
}
}
break;
case ProductSizeTier.SmallOversize:
weightFee = 2.06m;
if (weightCeiling > 2)
{
weightFee += (weightCeiling - 2) * 0.39m;
}
break;
case ProductSizeTier.MediumOversize:
weightFee = 2.73m;
if (weightCeiling > 2)
{
weightFee += (weightCeiling - 2) * 0.39m;
}
break;
case ProductSizeTier.LargeOversize:
weightFee = 63.98m;
if (weightCeiling > 90)
{
weightFee += (weightCeiling - 90) * 0.80m;
}
break;
case ProductSizeTier.SpecialOversize:
weightFee = 124.58m;
if (weightCeiling > 90)
{
weightFee += (weightCeiling - 90) * 0.92m;
}
break;
}
return(weightFee);
}
