Hi!I think you are asking how much does it cost to go to Mardi gras and the answer is that it is free yes it is free.(if my answer is wrong than let me know)
This is a sentence. You can tell because it has a subject (Imala) and a verb clause (will play). In addition, it has a direct object *what she is playing* (the solo) and a prepositional phrase for some added clarity (in the concert).