Campground Inc. is considering the production and sale of propane lamps. Annual fixed costs associated with the project are expected to total $60,000. In addition, each lamp would sell for $12 and would require $7 in variable costs. Calculate (a) the breakeven point in units, (b) the breakeven point in dollars, (c) the number of lamps that must be sold to earn a profit of $120,000, and (d) the operating income or loss at a sales volume of 16,000 lamps