The Nurse Is Calculating Intake and Output for a Client

The nurse is calculating intake and output for a client who has continuous closed bladder irrigation. There is 400 mL left in the liter bag of bladder irrigant which was hung at the start of the shift. There is 840 mL in the drainage bag. How much urine output did this client have during the shift?

A) 100 mL
B) 160 mL
C) 600 mL
D) 840 mL