5. A planned renovation of a 2,410 ft2 (224 m2) retail space with a 40-occupant capacity is located on the second floor of a 5-story commercial building. Calculate the approximate minimum outdoor air requirement if the people outdoor air rate is 7.5 cfm/person (3.8 l/s-person) and the area outdoor air rate 0.18 cfm/ft2 (o.9 l/s-m2).
A. 489 cfm (230.8 l/s)
B. 689 cfm (325.3 l/s)
C. 734 cfm (353.6 l/s)