# # # #PYRET
fun pen-cost(num-pens :: Number, message :: String) -> Number:
doc: ```total cost for pens, each 25 cents plus 2 cents per
message character```
num-pens * (0.25 + (string-length(message) * 0.02))
where:
pen-cost(1, "") is 0.25
end
fun add-shipping(order-amt :: Number) -> Number:
doc: "add shipping costs to order total"
if order-amt <= 10:
order-amt
else if (order-amt > 10) and (order-amt <= 30):
order-amt + 8
else:
order-amt + 12
end
end
# # # #PYTHON
def pen_cost(num_pens: int, message: str) -> float:
'''total cost for pens, each at 25 cents plus
2 cents per message character'''
return num_pens * (0.25 + (len(message) * 0.02))
def add_shipping(order_amt: float) -> float:
'''increase order price by costs for shipping'''
if order_amt <= 10:
return order_amt
elif (order_amt > 10) and (order_amt < 30):
return order_amt + 8
else:
return order_amt + 12
def test_pencost():
assert pen_cost(1, "") == 0.25