Respuesta :
I believe the answer would be $1200. Giving she makes $10 from every subscriber she has then last month she would have had $1000. Since she gained 30 subscribers, that would rise to 130 subscribers but since she lost 10 which would bring it back down to 120 subscribers.
Therefore, your answer is 120 x 10 = $1200.
Therefore, your answer is 120 x 10 = $1200.