A Broadway theater has 500 seats, divided into orchestra, Main, and balcony seating. Orchestra seats sell for $70 main seats for $55, and balcony seats for $35 If all the seats, the gross revenue to the theater is $25,600 if all the main and balcony seats are sold, but only half the orchestra seats are sold the gross revenue is $22,100. How many are there of each kind of seat?