After a retropubic prostatectomy, a patient needs continuous…

After a retropubic prostatectomy, a patient needs continuous bladder irrigation. The patient has an IV of D5W infusing at 150 ml/hr, and a triple-lumen urinary catheter with normal saline infusing at 200 ml/hr. The nurses empties the urinary catheter drainage bag three times during an 12-hour period for a total of 3580 ml. How many milliliters does the nurse calculate as urine?