Explain! simplify the expression and then evaluate for the given value of the variable. 5x3−2x+13+7x−6x3−4x+x3, as x=2

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.