Bluin Corporation pays its salesperson a flat salary of $5,750 per month and is considering paying $30 per unit instead. Current unit sales are 250 per month, but Bluin believes the compensation change will increase unit sales by 50%. Bluin's current contribution margin is $100 per unit. If Bluin switches the compensation and sales grow as expected, net operating income will ______ per month. Multiple choice question. increase by $7,000 decrease by $5,500 increase by $1,250 decrease by $7,500