Brown Office Supplies recently reported $14,000 of sales, $7,500 of operating costs other than depreciation, and $1,750 of depreciation. It had $9,000 of bonds outstanding that carry a 6.0% interest rate, and its federal-plus-state income tax rate was 25%. How much was the firm's earnings before taxes (EBT)?

a. $4,210

b. $5,290

c. $7,710

d. $4,750

e. $3,158