DVFD along with Frankford EMS and DSP Aviation were dispatched for vehicle into the building @ the Royal Farms store. Sussex Medic 103 witnessed the crash as they were just leaving the parking lot. Paramedics quickly noified the Sussex EOC, began to evacuate the building and provide pt care. DVFD crews @ the station heard the report and were on the street prior to dispatch. Amb. 73 along with Eng. 73-2 responded with Lieut. J. Marvel providing initial operations for stabilization as Deputy 73 T. McCabe established Royal Farms Command. The crew from Rescue 73 also assisted with extrcation efforts. 1 pt was transported by helicopter while 3 others were transported by ground to local hospitals.