Atheater manager is planning an upcoming concert. regular tickets will cost $12 and student tickets will cost $8. the theater can seat at most 200 people. the manager wants to collect at least $1000 from ticket sales. let x represent the number of regular tickets sold. let y represent the number of student tickets sold. which inequalities are among the constraints for this situation? select each correct answer. 12x+8y≤1000 12x+8y≥1000 x+y≥1000 x+y≤200 x+y≥200 12x+8y≤200