Krystal Clean Company had planned to clean $200$ houses at an average price of $$150$ per house. By reducing the service charge to $$115$ per house, the company was able to increase the actual number of houses cleaned to $300.$ Based on this information, what is the sales revenue flexible budget variance?

Multiple Choice

$$15,000$ favorable

$$15,000$ unfavorable

$$10,500$ unfavorable

$$10,500$ favorable