prompt\nthe cost of materials to make a good or provide a service is what type of cost?\nread more >>

Brief Explanations:

Variable costs change with the level of production or service. Material costs vary as more materials are needed for more goods or services. Fixed costs remain constant regardless of output. Opportunity cost is the value of the next - best alternative. Sunk cost is already incurred and unrecoverable. Since the cost of materials changes with production/service level, it's a variable cost.

Answer:

Variable cost