a rate of WS 50 for a voyage from Jubail to Rotterdam. To calculate how much money
he will earn he first looks up the rate per tonne for WS 100 from Jubail to Rotterdam.
Consulting the appropriate entry he finds that it is $17.30 per tonne. Since he has settled
at WS 50 he will receive half of this amount, i.e. $8.65 per tonne. If his ship carries
250,000 tonnes, the revenue from the voyage will be $2,162,500. It is an equally
simple matter to make the same calculation for a voyage to Japan.