sells televisions at an average price of 900 and also offers to each customer a separate 3 year service-type warranty contract for 90 that requires the company to perform periodic services and to replace defective parts. during 2014, the company sold 300 televisions and 270 warranty contracts for cash. it estimates the 3-year warranty costs as 20 for parts and 40 for labor and accounts for warranties separately. assume sales occurred on December 31, 2014, and straight-line recognition of warranty revenues occurs.