Lulzbot.com sells 6,000 units of its product for $500 each. The selling price includes a one year warranty on parts. It is expected that 3% of the units will be defective and that repair costs will average $50 per unit. In the year of sale, warranty contracts are honored on 120 units for a total cost of $6,000. What amount should Lulzbot.com accrue on December 31 for estimated warranty liability? O a $3,000 O b. $9,000 OC $45,000 Od $6,000