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Tax Free

You are shopping at a store that is having a special where you do not have to pay the tax on anything that costs 20 dollars or more! If you have a list of prices for all of your items, what is your total once the tax is added in? Tax is 7% on the items that you would still need to pay tax on.

Task:

Determine the total cost once you include tax of 7% on the items that are still taxed.

Input Format:

A string of numbers, separated by commas, that represent to price of each item that you are going to buy.

Output Format:

A number, rounded to two decimal places, of the total for your purchase once tax is included on items under 20 dollars.

Sample Input:

5,18,25,34

Sample Output:

83.61

Explanation:

You would only have to pay the tax on the 5 and 18 dollar items and that bring your total to $83.61.