For a sporting event 6,000 tickets were sold, and the proceeds were $78,000. Tickets for children 16 and younger, were $8, adults were $16, and seniors 60 and older were $12. There were 2 times more adults than children at the sporting event.

What system of equations represents the number of children, c, adults, a, and seniors, s, that attended the sporting event?

Responses
c+a+s=6,000
8c+12a+16s=78,000
2a=c

c+a+s=6,000
8c+16a+12s=78,000
a=2c

c+a+s=6,000
8c+12a+16s=78,000
a=2c


c+a+s=6,000
8c+16a+12s=78,000
2a=c