An electronic manufacturing company has determined that the monthly cost of producing x units of its newest stereo is C(x) = 2500 10x , and the monthly demand equation for this cost function is p = 60,000-x/1500 where x is the number of units and p is the price in dollars. Use the demand equation to find the monthly revenue equation. Then find the monthly profit equation and use it to compute the monthly marginal profit for a production level of 8250 units. The monthly marginal profit when 8250 units are produced and sold is _____________dollars?