Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of \$10$10dollar sign, 10 from each of the subscribers to her website. Last month, the website had 100100100 subscribers. This month, 303030 new members joined the website, and 101010 members cancelled their subscription. How much money will Kiersten’s online business earn this month?

Answer:$1200Step-by-step explanation:Given that:Monthly subscription fee = $10Last month's subscribers = 100THIS MONTH:New subscribers = 30canceled subscriptions = 10Hence, Total number of subscribers this month :(Last month subscription + new subscriptions - canceled subscriptions)(100 + 30 - 10) = 120 subscriptions this monthHence, amount earned this month will be :(Total subscriptions this month * monthly subscription fee)120 * $10 = $1200