Which of the following is true of the kinked demand model of​ oligopoly? A. Each firm believes that if it lowers its price the other firms will follow​ suit, but if it raises its price the other firms will not raise their prices.
B. Each​ firm's marginal revenue curve is discontinuous at its current level of output.
C. The model predicts price rigidity. For​ example, the firms may not change their prices when marginal costs change.
D. All of the above are true.

In a chapter 7 bankruptcy, a debtor:

Statistical process control charts: a. indicate to the operator the true quality of material leaving the process. b. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. c. indicate to the process operator the average outgoing quality of each lot. d. display the measurements on every item being produced. e. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule.

Levine inc., which produces a single product, has prepared the following standard cost sheet for one unit of the product. direct materials (9 pounds at $1.80 per pound) $16.20 direct labor (6 hours at $14.00 per hour) $84.00 during the month of april, the company manufactures 270 units and incurs the following actual costs. direct materials purchased and used (2,500 pounds) $5,000 direct labor (1,660 hours) $22,908 compute the total, price, and quantity variances for materials and labor.