Sum calculation with form checkboxes

Check the boxes to see the total sum change.

Make my add featured $19.95 (your ad seen before free listings)
Make my ad bold $4.95
Make my ad highlighted $4.95
Add Email $9.95
Add link to my website $9.95
Add 10 keywords $9.95
Add 20 keywords $19.95

Add larger description (up to 4,000 charters) $29.95

Add 10 keywords $9.95
Add 20 keywords $19.95

total