Need items added up using javascript

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
We have an online shopping cart that shows line items and the total quantity of each line item. We would like to have a simple javascript add up the line items into a grand quantity total.

For example:

Item 1 Qty 2
Item 2 Qty 5
Item 3 Qty 10

Javascript will show total quantity: 17

that's it.

Skills required:
Anything Goes, CSS, Javascript, PHP
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.