change currency_code and covert_rate

noidea.php

function woocommerce_paypal_args_for_noidea($paypal_args){
    if ( $paypal_args['currency_code'] == 'curreny_Code'){
 
        $convert_rate = 50;
 
        if (isset($paypal_args['tax_cart'])) {
            $paypal_args['tax_cart'] = round($paypal_args['tax_cart'] / $convert_rate, 2);
        }

        if (isset($paypal_args['shipping_1'])) {
            $paypal_args['shipping_1'] = round($paypal_args['shipping_1'] / $convert_rate, 2);
        }
    }
    return $paypal_args;
}

add_filter('woocommerce_paypal_args', 'woocommerce_paypal_args_for_noidea');