"write code to assign to the variable format a formatting string that will display three values referenced by the variables quantity (type int), description (type str), and unitprice (type float) in the format illustrated by: (type "_10 one-inch three-ring $.50"). the quantity is displayed right-justified in 3 print positions, the description is displayed left-justified in 30 print positions, and the amount is displayed after a dollar sign with a total of 7 print positions and two digits after the decimal point. in the example, an underscore character is used to indicate the presence of a filler space. the underscores are not part of the actual string."