Theodore and Sarah have a small business selling custom made t-shirts. they currently sell 205 shirts per month and charge $15 per t-shirt. Sarah thinks they can increase the revenue by increasing their selling price, but Theodore knows from experience that each $1 increase in price will decrease the number of t-shirts they sell by 9 shirts per month. Find an expression for the total monthly revenue Theodore and Sarah's business can generate if they change the selling price of their t-shirts. let x represent the number of $1 increases in the price of the t-shirts.