How to Travel from Philadelphia to King of purssia mall?|118139

Please suggest the best and the cheapest way to reach King of purssia mall from Philadelphia as this is my first visit to US.Is there any bus service from Philadelphia to King of Purssia mall.

From center city Philadelphia (15th St. and Market St, take bus #125 directly to the mall. It may say _Valley Forge Park_ on the front of the bus, I_m not sure. It takes an hour and costs $3.50.

Shop til you drop.