How to add amount of 2 items and display in paypal

[HariKiran]

Hi,

I want to know ,how to select more than 1 product and calculate its sum, and how to redirect this amount in paylpal for a single user.I'm using a check box to select 2 or more items and not able to calculate the total amount because when i tried the sandbox environment it hav the following fields for a single item
[code=php]
$paypal[item_name]="$_POST[item_name]";
$paypal[item_number]="$_POST[item_number]";
$paypal[amount]="$_POST[amount]";
[/code]

So what neeeds to be done for more than 2 .
Thanks

[pbmods]

Heya, HariKiran. Welcome to TSDN!

Please use CODE tags when posting source code:

[CODE=ph p]
PHP code goes here.
[/CODE]