Ask the user to input a line of text with the prompt "Enter a string: ". The program should extract all numbers (either with a decimal point our without one) from the line of text, compute their sum, and print it as a floating point number with two places to the right of the decimal point. (To print the floating point variable ff with exactly two decimal places use print('%.2f' % ff) as explained in section 7.2 of our book, see figure 7.2.2 and the paragraph just above it.)

For example, if the input was

The sum of 246 and 1025 is

the output should be the single line

1271.00

If the input is

Fried oysters $12.75, salad $3.35, coffee $1.85, tax 1.36

the output should be

19.31

And if the input is

dyuadgh12345agdfkl;j12

the output should be

12357.00