I have a form that looks like this: I’ll paypal $15 to the first person who posts clean php code that achieves the following: 1. The code will work on an .html page. (the .htaccess has already been written to enable parsing of php code). 2. Column 4 in each row will be a text box. Users will be able to enter their own number into this text box OR have the text box filled in for them by selecting one of the radio buttons from the same row. For example, in Row 1, the user will be able to enter their own number in Column 4 or put value a, value b or value c into the textbox by clicking on the appropriate radio button. (a,b and c are numbers.) The user will also be allowed to change their mind and select or enter new values at any stage. 3. After the user has placed a number in Column 4 for each of Rows 1,2,3 and 4, they can press the Add button. This will add up the numbers in each text box in Column 4 to produce a result. (Users will be allowed not to place a value in any row. In this case, the value in column 4 of that row should be counted as zero when the addition is carried out.) Thanks.