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script.py

def cost_ground(weight):
  if weight <= 2:
    cost = weight * 1.5 + 20
    return cost
  elif 2 < weight <= 6:
    cost = weight * 3.0 + 20
    return cost
  elif 6 < weight <= 10:
    cost = weight * 4.0 + 20
    return cost
  elif weight > 10:
    cost = weight * 4.75 + 20
    return cost
  else:
    return Error
    print ("Sth went wrong in cost_ground")

#print(cost_ground(8.4))

cost_premium = 125.0

def cost_drone(weight):
  if weight <= 2:
    cost = weight * 4.5
    return cost
  elif 2 < weight <= 6:
    cost = weight * 9.0
    return cost
  elif 6 < weight <= 10:
    cost = weight * 12.0
    return cost
  elif weight > 10:
    cost = weight * 14.25
    return cost
  else:
     return Error
     print ("Sth went wrong in cost_drone")

print(cost_drone(1.5))

def cheapest_shipping(weight):
  if cost_ground(weight) < (cost_drone(weight) and  cost_premium):
    return "Ground shipping is the cheapest method for your shipment. It would cost " + str(cost_ground(weight)) + " Dollars."

  elif cost_premium < (cost_drone(weight) and cost_ground(weight)):
    return "Premium ground shipping is the cheapest method for your shipment. It would cost " + str(cost_premium) + " Dollars."

  elif cost_drone(weight) < (cost_ground(weight) and cost_premium):
    return "Drone shipping is the cheapest method for your shipment. It would cost " + str(cost_drone(weight)) + " Dollars." 


print(cheapest_shipping(4.8))

print(cheapest_shipping(41.5))