Sillyday Park competes with Water World by providing a variety of rides. Sillyday sells tickets at $120 per person as a one-day entrance fee. Variable costs are $30 per person, and fixed costs are $585,000 per month. Compute the contribution margin per unit and the number of tickets Sillyday Park must sell to break even. Perform a numerical proof to show that your answer is correct. Begin by selecting the formula labels and then entering the amounts to compute the contribution margin per unit. = Contribution margin per unit Fixed costs Net sales revenue Net sales revenue per unit Variable costs Variable costs per unit K