You are given an HTML table with 4 columns: Town, Store1, Store2 and Store3. It consists of sequence of text lines: the "<table>" tag, the header row, several data rows, and "</table>" tag (see the examples below). The Store1, Store2, and Store3 columns hold either numbers or "-" (which means "no data"). Your task is to write a program which parses the table data rows and finds the row with a maximal sum of its values.

 while (true)
            {
                string input = Console.ReadLine();
                if (input == "</table>")
                {
                    break;
                }

Регекса ми е :     (-?[0-9\.]+)

Хваща си всичките интове дабъли и т.н. но въпроса ми е как да си обходя линия по линия зада си сумирам съвпаденията.Пример:

<table>

<tr><th>Town</th><th>Store1</th><th>Store2</th><th>Store3</th></tr>

<tr><td>Sofia</td><td>26.2</td><td>8.20</td><td>-</td></tr>

<tr><td>Varna</td><td>11.2</td><td>18.00</td><td>36.10</td></tr>

<tr><td>Plovdiv</td><td>17.2</td><td>12.3</td><td>6.4</td></tr>

<tr><td>Bourgas</td><td>-</td><td>24.3</td><td>-</td></tr>

</table>

11.2+18.00+36.10