Last Chance Gaming manufactures slot machines that are sold to individuals for $$640$ each. Fixed operating costs are $$460,800,$ and each machine's variable cost is $80$ percent of its selling price.

a$.$ What is the firm's operating breakeven point? Round your answer to the nearest dollar.

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b$.$ What is the firm's degree of operating leverage at sales equal to $($i$)5,000$ machines and $($ii$)7,000$ machines? Do not round intermediate calculations. Round your answers to two decimal places.

DOL at sales equal to $5,000$ machines:

DOL at sales equal to $7,000$ machines: