Hi, I'm new here and I've searched extensively for an answer to this problem but I cannot find one, so here it goes.

Background on the site so far: I have the following modules/modifications installed: Local Sales Tax Mod, multi-cross sell v1, Simple Google Analytics, Mail Chimp 2.1 and the Css/Javascript loader minus the Fast and Easy Checkout module, which a work in progress which has been giving me other issues.

I was testing my checkout before I launch my site and when I go to the payment page: http://www.fingerlakesfoodie.com/Sho...eckout_payment

the page appears blank. I looked at my debugging log and this is what appears:

[28-Mar-2011 11:43:25] PHP Fatal error:
Call to undefined function get_store_tax_basis() in /home/finger10/public_html/Shop/includes/modules/order_total/ot_local_sales_taxes.php on line 45


This is the line from the file catalog/includes/modules/order_total/ot_local_sales_taxes.php that I believe the debugging log is referring to, but I do not know how to fix it.
function process(){
global $order;
global $currencies;
global $db;

if($this->mod_debug =='true'){
$debug = true;
}else{
$debug = false;
}


//find out the store tax method - checking for store pick up too
$customer_ship_method = $order->info['shipping_module_code'];
$ot_local_sales_taxes_basis = get_store_tax_basis($customer_ship_method);
Any help would be appreciated, I've been doing alright so far on this site, and this is the first snag I haven't been able to figure out on my own.