Two costs at Bradshaw Company appear below for specific months of operation.

	Month	Amount	Units Produced
Delivery costs	September	$40,000	40,000
	October	55,000	60,000
Utilities	September	84,000	40,000
	October	126,000	60,000

Which type of costs are these?

Delivery costs and utilities are both variable costs.

Delivery costs and utilities are both mixed costs.

Delivery costs are a mixed cost and utilities are a variable cost.

Utilities are a mixed cost and delivery costs are a variable cost.