An online furniture store sells chairs for $100 each and tables for $450 each. Every day, the store can ship no more than 18 pieces of furniture and must sell no less than $3200 worth of chairs and tables. Also, the store must sell a minimum of 8 tables. If xx represents the number of tables sold and yy represents the number of chairs sold, write and solve a system of inequalities graphically and determine one possible solution.