Theodore and sarah have a small business selling custom-made t-shirts. they currently sell 150 shirts per month and charge $10 per t-shirt. sarah thinks they can increase their 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 8 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