2. challenge problem yen luong owns a used pickup truck that she
wants to sell. a used-vehicle guide shows that its average retail value is
$17,600. she adds $1,700 for 4-wheel drive, $475 for an entertainment
system, $800 for a special trim package, and $225 for power locks. she
also adds $125 for a sliding rear window, $325 for a towing package,
$250 for power windows, and $3,125 for a diesel engine. she deducts
$675 for having a manual transmission. she adds $450 for having less
than the expected mileage. what is the average retail price of yen's
vehicle?