Average total cost (dollars per scooter)
Q = 50 Q = 100 Q = 150 Q = 200 Q = 250 Q = 300
1 220 140 120 160 240 400
2 310 190 120 120 190 310
3 400 240 160 120 140 220
Which quantity (Q) corresponds to the minimum average total cost per scooter?
a) 50
b) 100
c) 150
d) 200