Question: How would you read an amount to be added to a total from a text file referenced by a file object salesfile assuming amounts are

How would you read an amount to be added to a total from a text file referenced by a file object salesfile assuming amounts are on separate lines in the file and the file has other data?

amount = salesfile.input().rstrip()

amount = float((salesfile.readline()).rstrip())

amount = float(salesfile.read())

amount = salesfile.read()

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