Which of the following statements is true of a normal costing system?

1. In a normal costing system, only the costs incurred for direct materials are used to determine unit cost.
2. In a normal costing system, only actual costs of direct materials, direct labor, and overhead are used to determine unit cost.
3. In a normal costing system, unit costs are determined by adding estimated direct materials, estimated direct labor, and actual overhead.
4. In a normal costing system, unit costs are determined by adding actual direct materials, actual direct labor, and estimated overhead.

1. which one of the following would be an example of a supply-side market failure? a. a gas station is slowly leaking diesel fuel from its underground tanks, and after the leak is discovered, the business immediately cleans up the pollution at its own expense. b. a gas station is slowly leaking diesel fuel from its underground tanks, but the state uses taxpayer money to clean up the pollution rather than requiring the business to pay. c. your business wants to attract repeat customers by putting on a customer-appreciation picnic at a public park, but you decide not to because you couldn't prevent noncustomers from consuming the food and entertainment you provided. d. everyone rushes to the local retail outlet at midnight on the day of the release of a new video game console, and the store runs out before everyone is able to buy one.