Robin Company reported the following costs for the current month:

Direct materials used

Direct labor

Sales salaries

Indirect labor

Production manager's

salary

Marketing costs

Factory lease

$$23,000$

$19,800$

$8,750$

$1,500$

$6,210$

$9,560$

$4,475$

What are Robin's prime costs?

Multiple Choice

$$42,800$

$$39,610$

$$28,550$

$$34,760$