Tickets for a recent concert cost $20 for adults and 512 for kids. Total attendance for the concert was 840 and total ticket sales were $12.496. How many of each ticket type were sold? a. 2,912 adult tickets, -2,072 kid's tickets b. 212 adult tickets, 628 kid's tickets c. 302 adult tickets, 538 kid's tickets
d. 53 adult tickets, 787 kid's tickets