The total revenue for Joe's Realty is given as the function R(x)=200x-0.5x2R(x)=200x-0.5x2, where x is the number of villas booked. What number of villas booked produces the maximum revenue? An appliance company has determined that the cost of producing ice cream makers is $37.50$37.50 per ice cream maker plus $875$X875 per month in fixed costs. The appliance company sells each ice cream maker for $50$X50. Step 1 of 4: Find the revenue function. Step 2 of 4: Find the cost function. Step 3 of 4: Find the profit function. Step 4 of 4: Find the break-even point.