+ $supp_currency = get_supplier_currency($_POST['supplier_id']);
+ $bank_currency = get_bank_account_currency($_POST['bank_account']);
+ $comp_currency = get_company_currency();
+ if ($comp_currency != $bank_currency && $bank_currency != $supp_currency)
+ $rate = 0;
+ else
+ $rate = input_num('_ex_rate');
+