Calculate the ratio of variable costs to sales for a firm with $3,900,000 accounting break-even revenues, $1.6 million fixed costs, and $740,000 depreciation?

What is the accounting break-even level of revenues for a firm with $9 million in sales, variable costs of $5.4 million, fixed costs of $1.4 million, and depreciation of $1 million? (Do not round intermediate calculations.)

A firm with $780,000 fixed costs and $380,000 depreciation is expected to produce $405,000 in profits. What is its DOL? (Do not round intermediate calculations.)

A firm with 50% of sales going to variable costs, $1.6 million fixed costs, and $510,000 depreciation would show what accounting profit with sales of $4 million? Ignore taxes.