Need jQuery Table Sorter Sorting

Hello, We have a table in place with data in it. We have the table sorter working to sort when the table headers are clicked and we have it working to sort results out between two dates. We now require the following: 1. To add up the values in a row at the bottom when the table is sorted and on some columns when it isnt sorted. 2. A button that allows you to download the sorted table via csv 3. 3 buttons above table that lets your pick criteria Year, Month and Person then a button to load. This should be a quick and easy job for someone to sort out who knows this.