diff --git a/buy_nine_get_one_free.py b/buy_nine_get_one_free.py
new file mode 100644
index 00000000..4ef1701b
--- /dev/null
+++ b/buy_nine_get_one_free.py
@@ -0,0 +1,17 @@
+# 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
\ No newline at end of file