Suppose a firm has an annual budget of $200,000 in wages and salaries, $75,000 in materials, $30,000 in new equipment, $20,000 in rented property, and $35,000 in interest costs on capital. the owner/manager does not choose to pay himself, but he could receive income of $90,000 by working elsewhere. the firm earns revenues of $360,000 per year. what are the annual explicit costs for the firm described above?