Infiniti Hybrid Priced at $54,575

  Infiniti has set a base price of $54,575, including shipping charges, on the 2012 M Hybrid sedan. The luxury division of Nissan said the car will go on sale on March 16.  The Infiniti M Hybrid's powertrain mates a 302-hp 3.5-liter V6 with a 67-hp electric motor. That power flows through a seven-speed automatic transmission to the rear wheels. The sedan is rated at 27 mpg city and 32 mpg