[Mod King]

Here's the fix i did that seemed to work.

I didn't post the whole function, but here is part of it. I am not sure what versions everyone is using, but this is the fix to mixmans

its in ./funch.php
around line 731 for his, in the function func_calculate_single

I put comments in where i added some lines so everyone can see the change.

#
# Deduct discount
#
		$discount_info = func_query_first("select * from $sql_tbl[discounts] where minprice<='$avail_discount_total' $provider_condition and membership='$customer_info[membership]' order by minprice desc");
		$discountall_info = func_query_first("select * from $sql_tbl[discounts] where minprice<='$avail_discount_total' $provider_condition and membership='' order by minprice desc");
		if ($discount_info["discount_type"]=="absolute" && $avail_discount_total>0)
				$discount += $discount_info["discount"];
		elseif ($discount_info["discount_type"]=="percent")
				$discount += $avail_discount_total*$discount_info["discount"]/100;
       	elseif ($discountall_info["discount_type"]=="absolute" && $avail_discount_total>0)
                $discount += $discountall_info["discount"];
		elseif ($discountall_info["discount_type"]=="percent")
				$discount += $avail_discount_total*$discountall_info["discount"]/100;

		$total = $total-$discount;
        //mod king change here
        $total_shipping -= $discount;
        $total_taxable_gst-=$discount;
        $total_taxable_pst-=$discount;
		//end of lines added
        $total_taxable-=$discount;
                if ($total_shipping < 0)
                        $total_shipping = 0;
#
# Deduct discount by discount coupon
#
        $coupon_discount=0;
        $coupon_total = 0;
        $coupon_amount = 0;

        $discount_coupon_data = func_query_first("select * from $sql_tbl[discount_coupons] where coupon='$discount_coupon' $provider_condition");

        if (($discount_coupon_data["productid"]>0) and (($discount_coupon_data["coupon_type"]=="absolute") or ($discount_coupon_data["coupon_type"]=="percent"))) {
                foreach($products as $product) {
                        if ($product["productid"] == $discount_coupon_data["productid"]) {
                                $coupon_total += $product["price"]*$product["amount"];
                                $coupon_amount += $product["amount"];
                        }
                }
                if ($discount_coupon_data["coupon_type"]=="absolute") {
                        $coupon_discount = $coupon_amount*$discount_coupon_data["discount"];
                } else {
                        $coupon_discount = $coupon_total*$discount_coupon_data["discount"]/100;
                }
        } elseif (($discount_coupon_data["categoryid"]>0) and (($discount_coupon_data["coupon_type"]=="absolute") or ($discount_coupon_data["coupon_type"]=="percent"))) {
                foreach ($products as $product) {
                        if ($product["categoryid"] == $discount_coupon_data["categoryid"]) {
                                $coupon_total += $product["price"]*$product["amount"];
                                $coupon_amount += $product["amount"];
                        }
                }
                if ($discount_coupon_data["coupon_type"]=="absolute") {
                        $coupon_discount = $coupon_amount*$discount_coupon_data["discount"];
                } else {
                        $coupon_discount = $coupon_total*$discount_coupon_data["discount"]/100;
                }
        } else {
                if ($discount_coupon_data["coupon_type"]=="absolute")
                $coupon_discount = $discount_coupon_data["discount"];
        elseif ($discount_coupon_data["coupon_type"]=="percent")
                $coupon_discount = $total*$discount_coupon_data["discount"]/100;
        }

        if ((!$single_mode) and (($discount_coupon_data["provider"] != $provider_for) or (!$products)))
                $discount_coupon = "";

        $total = $total-$coupon_discount;
        //mod king change here added these 3 lines
        $total_taxable_gst-=$coupon_discount;
        $total_taxable-=$coupon_discount;
        $total_taxable_pst-=$coupon_discount;
		//end of change
        $total_shipping -= $coupon_discount;
        if ($total_shipping<0)
                $total_shipping = 0;