Challenge 2: Formatted Receipt Line — Possible Solution
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item = "Coffee"
price = 4.5
qty = 3

total = price * qty

print(f"{qty}x {item}: ${total:.2f}")

Output:
3x Coffee: $13.50

WHY THIS WORKS AS AN ANSWER
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total = price * qty calculates 4.5 * 3 = 13.5 as a plain float before
formatting it — the multiplication itself has nothing to do with
string formatting, it's just ordinary arithmetic from Chapter 3.

The f-string f"{qty}x {item}: ${total:.2f}" then embeds three separate
pieces directly inside the string: qty and item are inserted as-is,
while total uses the :.2f format spec from the chapter's Pi-rounding
example to force exactly two decimal places — turning 13.5 into the
receipt-correct "13.50" rather than printing it as a bare "13.5".

The literal $ character in the string is not part of any format spec
— it's ordinary text sitting outside the {} braces, printed exactly
as written.