Why im getting this error ? TypeError: unorderable types: float() < tuple()

project link: https://www.codecademy.com/courses/learn-python-3/projects/sals-shipping
Hi, im doing the sal’s shipping project and cant seem to get pass this error:

TypeError: unorderable types: float() < tuple():

That’s the line thats causing the problem:

if ground<prem and ground<drone:

Here is my full code:

def priceground(weight):
if weight<2:
ppp = 1.50
elif weight<=6:
ppp = 3.00
elif weight <= 10:
ppp = 4.00
else:
ppp= 4.75
return weight * ppp + 20

def pricedrone(weight):
if weight<2:
ppp = 4.50
elif weight<=6:
ppp = 9.00
elif weight<=10:
ppp = 12
else:
ppp = 14,25

return weight * ppp

priceprem = 125.00

def printcheapmethod(weight):
drone = pricedrone(weight)
prem = priceprem
ground = priceground(weight)
if ground<prem and ground<drone:
cost = ground
method = “Ground Shipping”
elif prem<ground and prem<drone:
cost = prem
method = “Premium Shipping”
else:
cost = drone
method = “Drone Shipping”
print(“the cheapest methoid is " + method + " and the price is $” + cost)

printcheapmethod(20)

Comparisons depend upon type match in order to render a valid yield. Trace back the variables being compared and see that they are the same type before comparing them.