Heat Co. sells microwaves for $1,000 with a 90-day warranty against defects. Senior management indicates that 6% of the microwaves will have some defect during the warranty period and that the necessary repairs and adjustments will cost 10% of the original selling price per defective unit. Sales for the first quarter were $750,000. Exactly 20 units were reported defective and repaired during the quarter. What is the journal entry at the end of the quarter to record the estimated remaining warranty liability for units sold during the first quarter? The company has not yet recorded a journal entry related to the estimated remaining warranty liability for this quarter. Select one: a. Product Warranty Expense Estimated Liability for Product Warranty $2,000 $2,000 b. Product Warranty Expense Estimated Liability for Product Warranty $4,500 $4,500 C. Estimated Warranty Liability for Product Warranty $2,000 Product Warranty Expense $2,000 d. Product Warranty Expense Estimated Liability for Product Warranty $2,500 $2,500