PRACTICE Ben's Bicycle Helmets makes bicycle helmets at a cost of 3000 + 12x dollars per month to produce x helmets. They sell the helmets for $21 each. 1. Determine the cost to produce 500 helmets. 2. Write an expression to represent the revenue received by selling helmets. 3. Determine the revenue for selling 500 helmets. 4. Write an equation that can be used to determine the break-even point, the point where the revenue = costs. 5. Identify the break-even point. 6. Will Ben's Bicycle Helmets earn a profit by selling 500 helmets a month? Justify your response