Original sentence: Considering the actual slow rate of PEV sales, as of mid 2012 several industry observers have concluded that this goal is unattainable.The federal tax credit for new plug-in electric vehicles (PEVs) is worth $2,500 plus $417 for each kilowatt-hour of battery capacity over 5 kWh, and the portion of the credit determined by battery capacity cannot exceed $5,000
Edited sentence: The federal tax credit for new plug-in electric vehicles is worth $2,500 plus $417 for each kilowatt-hour of battery capacity over 5 kWh, and the portion of the credit determined by battery capacity cannot exceed $5,000