Ez wheels corporation manufactures kick scooters. the company offers a one-year warranty on all scooters. during 2017, the company recorded net sales of $1,900 million. historically, about 4% of all sales are returned under warranty and the cost of repairing and or replacing goods under warranty is about 30% of retail value. assume that at the start of the year ez wheels’ balance sheet included an accrued warranty liability of $16.3 million and at the end of the year, the accrued warranty liability balance was $12.4 million. what was ez wheels corporation’s warranty expense for 2017?