Your operating room (OR) expects to have an unusually high number of operations for kidney transplants this year. You decide to hire extra part-time nurses to help out. You plan to pay $18,750 for these nurses. You expect to pay these nurses for 750 hours, and you are expecting 150 operations. You actually paid an average of $27 per hour for 680 hours. There actually were 135 operations. Calculate the price, quantity, and volume variances. Indicate whether each is favorable or unfavorable. Explain whether you think the variances are good or bad for the OR