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script.py

def cost_ground_shipping(weight):
  if weight<=2:
    return 1.5*(weight) + 20
  elif weight<=6:
    return 3*(weight)  + 20
  elif weight<=10:
    return 4*(weight)  + 20
  else:
    return 4.75*(weight)  + 20

#print(cost_ground_shipping(8.4))



def cost_drone_shipping(weight):
  if weight<=2:
    return 4.5*(weight) + 0
  elif weight<=6:
    return 9*(weight)  + 0
  elif weight<=10:
    return 12*(weight)  + 0
  else:
    return 14.25*(weight)  + 0
  
def cheapest(weight):
  method3 = 125
  method2 = cost_drone_shipping(weight)
  method1 = cost_ground_shipping(weight)
  
  if method1<method2 and method1<method3:
    print("Ground")
  elif method2<method3 and method2<method1:
      print("Drone")
  elif method3<method1 and method3<method2:
        print("Premium")
 
                
print(cheapest(1.8))                        
print(cheapest(4.8))
print(cheapest(41.5))