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Add exercise script - buy_nine_get_one_free.py #555

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Add exercise script - buy_nine_get_one_free.py #555

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17 changes: 17 additions & 0 deletions buy_nine_get_one_free.py
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# Buy 9 Get 1 Free

def buy_nine_get_one_free(my_quantity, my_product_price):
my_price_to_pay = 0
for my_q in range(1,my_quantity+1):
if my_q % 10 == 0:
my_price_to_pay = my_price_to_pay
else:
my_price_to_pay += my_product_price
return my_price_to_pay


# Asserts
assert buy_nine_get_one_free(8, 2.50) == 20
assert buy_nine_get_one_free(9, 2.50) == 22.50
assert buy_nine_get_one_free(10, 2.50) == 22.50
assert buy_nine_get_one_free(11, 2.50) == 25