[Cypress]

The best way would be creating an array containing all the locations of the checkpoints. After the array you'd have to go manually with a 1 sec timer which would check if player is on a job, in this case it would be the job ID associated to the checkpoints and a count variable probably. Then you'd check if the player is in range of those points and give them the price that could be also set thru the array.

If you're looking for the code to be done for you, you're wrong. You'd have to script it all yourself, unfortunately. From there on when you're stuck, you could always ask for help.