Chargeable weight, landed cost, margin

Chargeable W/M

3.00

Landed cost

$459.00

Quote at 25% margin

$612.00

Gross profit

$153.00

Where the $459 goes

Line	Amount
Ocean freight (3.00 W/M × $45)	$135.00
Origin ($120 + $8/W/M)	$144.00
Destination ($80 + $5/W/M)	$95.00
BAF, CAF, ISPS, other	$55.00
Insurance (0.3% of $10,000, minimum $30)	$30.00
Landed cost	$459.00

Margin is on the sell price, not a markup on cost: $459 ÷ (1 − 25%) = $612.00.

Carrier B has the lower ocean rate and still lands $20 higher once origin, destination, surcharges and docs are counted. The table marks the cheaper landed cost, not the cheaper headline rate.

Same 3.00 W/M · same 25% margin

Carrier	Freight	Origin	Destination	Surcharges	Insurance	Docs	Landed	Quote	Profit
Carrier A · best landed	$135.00	$144.00	$95.00	$55.00	$30.00	$0.00	$459.00	$612.00	$153.00
Carrier B	$126.00	$153.00	$102.00	$53.00	$35.00	$10.00	$479.00	$638.67	$159.67

B is $9 cheaper on freight and $20 more expensive on the door. That is the comparison the file makes, and it is why the freight rate alone is the wrong number to negotiate.

• Zero weight and zero volume: rejected, because an empty shipment is not a zero-cost quote.
• Negative rates, charges or insurance: rejected instead of treated as free.
• A margin of 100% or more: rejected rather than dividing by zero.
• Carrier B's cheapest rate: the landed column can still lose — the table says so.

Contents of the ZIP

File	What it does
index.html	The calculator: chargeable W/M, landed cost, quote, break-even, carrier comparison, print
README.md	The arithmetic and the limits of the model
LICENSE.txt	Single-person licence, editable for your own rates
tests/math.test.js	18 assertions: chargeable weight, minimum W/M, landed cost, margin, carrier comparison

Product details and price