The following data are obtained for a patient who is receiving VC, A/C ventilation:

Peak pressure: 30 cm H₂O
Plateau pressure: 20 cm H₂O
Set Vt: 800 mL
Exhaled Vt: 700 mL
PEEP: 10 cm H₂O

What is the static compliance?
A. 35
B. 40
C. 27
D. 70