Running Subtotal

Read prices one per line with the prompt Price: until a blank line. After each price, convert it with float(), add it to the total and print Subtotal: <total> with two decimals; after the blank line print Total: <total> the same way. Input: zero or more prices, then an empty line. Prompts are part of the output, so each subtotal follows a prompt on the same line.

Expected Output:

Price: Subtotal: 2.50↵
Price: Subtotal: 3.75↵
Price: Total: 3.75↵

= newline. The output ends with a newline — print one after the last line.

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