The cost of serving an account beyond the goods: delivery drops, returns and credits, pick lines, each at a stated rate. Subtracted from gross margin to give contribution per account, which ranks accounts differently from revenue.
A ranking built on unstated rates cannot be defended. Put them on the report.
Averaged cost to serve reproduces the revenue ranking. Use the account's own deliveries and returns.
Driver counts per customer, such as drops, order lines by channel, visits and return lines, each multiplied by a rate equal to the cost pool divided by the total driver count.
Delivery costs $1.9 million for 50,000 drops: $38 a drop. A customer taking 250 drops carries $9,500 of delivery cost on $90,000 of revenue.
Fixed overhead included in the pools, which makes every small customer look unprofitable for costs they do not cause.