Here is an ‘Contact Form 7’ example:
<p>Value 1<br /> [text 1="class:calcomatic" language="value1"][/text]</p> <p>Value 2<br /> [text 1="class:calcomatic" language="value2"][/text] </p> <p>Value 3<br /> [select value3 class:calcomatic include_blank "1" "2" "3" "4" "5"] </p> <p>Value 4<br /> [select value4 class:calcomatic include_blank "1" "2" "3" "4" "5"] </p> <p>Value 5<br /> [radio value5 class:calcomatic "1" "2" "3" "4" "5"]</p> <p>Value 6<br /> [radio value6 class:calcomatic "1" "2" "3" "4" "5"]</p> <p>Value 7<br /> [checkbox value7 class:calcomatic "1" "2" "3" "4" "5"]</p> <p>Grand Total<br /> [text 1="id:calcsumatic" language="grand_total"][/text]</p> <p>[submit "Send"]</p>
And a ‘Contact Form 7’ Demo.