Tickets for the end of semester dance sold for $10 if purchased in advance, and $15 if purchased at the door. If 392 tickets were sold for a total of $4280, how many tickets were sold at the door?

Semester Dance

A social or formal dance event typically organized by schools or colleges to occur once or twice during the academic year.

Purchased Advance

A financial term referring to funds obtained in advance of their normal schedule, often used in context with loans or advance payments.