A banquet hall offers two types of tables for rent: 6-person rectangular tables at a cost of $22 each and 10-person round tables at a cost of $53 each. Kelly would like to rent the hall for a wedding banquet and needs tables for 240 people. The room can have a maximum of 39 tables and the hall only has 15 rectangular tables available. How many of each type of table should be rented to minimize cost and what is the minimum cost?