A stadium has 49,000 seats. Seats sell for ​$42 in Section​ A, ​$36 in Section​ B, and ​$30 in Section C. The number of seats in Section A equals the total number of seats in Sections B and C. Suppose the stadium takes in ​$1,851,000 from each​ sold-out event. How many seats does each section​ hold?