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 Corporations warranty expense for 2017?