Receipt line with an f-string
Write receipt_line(item, quantity, price) that returns one line of a
receipt in exactly this format, where the last number is quantity times price:
receipt_line("bread", 3, 40) -> "3 x bread = 120"
receipt_line("milk", 2, 2.5) -> "2 x milk = 5.0"
The total is written the way Python prints it, so 2 * 2.5 appears as
5.0, not 5.
def receipt_line(item, quantity, price):
...