$tax_items = get_trans_tax_details(ST_SUPPCREDIT, $trans_no);
display_supp_trans_tax_details($tax_items, 1);
$display_total = number_format2(-($supp_trans->ov_amount + $supp_trans->ov_gst),user_price_dec());
$tax_items = get_trans_tax_details(ST_SUPPCREDIT, $trans_no);
display_supp_trans_tax_details($tax_items, 1);
$display_total = number_format2(-($supp_trans->ov_amount + $supp_trans->ov_gst),user_price_dec());