Hall Company sells merchandise with a one-year warranty. In the current year, sales consisted of 4,500 units. It is estimated that warranty repairs will average $10 per unit sold, and 30% of the repairs will be made in the current year and 70% in the next year. In the current year's income statement, Hall should show warranty expense of:______

a. $13,500

b. $31,500

c. $0

d. $45,000