A charity is organizing a fundraiser where they sell two types of tickets: adult tickets for $12.50 each and child tickets for $7.50 each. If the charity aims to raise a total of $500, and represents the number of adult tickets sold and represents the number of child tickets sold, which of the following tables correctly shows possible combinations of that would meet the fundraising goal?
a=10, c=50; a=22, c=30; a=34, c=10
a=10, c=50; a=20, c=30; a=30, c=10
a=10, c=40; a=22, c=25; a=34, c=5
a=12, c=50; a=24, c=30; a=36, c=10
