Job costs are the labor and materials a specific job consumed. They are the opposite of overhead, which the business carries whether or not that job happens.
Omnyra tracks the two halves separately, as average labor cost per job and average material cost per job, because they move for different reasons and have different fixes.
Reading them together
Material cost rising while labor holds steady usually means supplier prices moved and quotes have not caught up. Labor rising while materials hold steady usually means jobs are taking longer than estimated — a scheduling or scoping problem rather than a purchasing one.
Both rising together, with revenue flat, is a pricing problem.
Vehicle running cost sits mostly in overhead rather than on the job — see vehicle costs — which is why drive time is the cost most often missed.