The Question:
At what point does a campaign become profitable?
Approach:
How many sales do we need to cover all our costs?
Commentary:
We need to understand the Marginal Profit Per unit (ie sale price less variable costs, including COGS, commission, fulfillment etc) Don't run a campaign or cell unless you expect to breakeven! Test if necessary.The Formula
Breakeven (# of units) = Fixed Costs ($)/ Contribution Per Unit ($)
or
Breakeven (# of units) = Fixed Costs ($)/ (Sale Price($) – COGS($) – Variable Costs($))
WARNING!!!
Remember what are fixed and variable costs!
Fixed Costs = Those that do not vary with volume of sales
Variable Costs = Those that increase with sales
Variable costs can include:
- Commission on sales
- Delivery and packing costs for the item(s) sold
- Free gifts with the order, etc
Per contact DM costs of the marketing campaign must be totalled and added to fixed costs
Metrics: Breakeven Response Rate
The Question:
What response rate do I need for my DM campaign to be profitable?
Approach:
What are my per contact costs, and what is my average profit?
Commentary:
We need to calculate total costs to contact a full list or a test cell, and know our average contributing profits on a sale
The Formula:
Break Even Response Rate (%) = Cost Per Contact ($)/ Contributing Profit Per Sale ($)
Metrics: Size of Test Cell
The Question:
How big should a test cell be, to accurately measure profitability?
Approach:
A formula based on breakeven response rates
Commentary:
We need to mail enough contacts to get a statistically valid result, without wasting any more money than needed
The Formula:
Test Cell Size = 4/ Break Even Response Rate