Simple way to change your current currency symbol in woocommerce code. Use below code in the function.php file to change symbol befor the actual values of price.

add_filter(‘woocommerce_currency_symbol’, ‘change_existing_currency_symbol’, 10, 2);

function change_existing_currency_symbol( $currency_symbol, $currency ) {
switch( $currency ) {
case ‘EUR’: $currency_symbol = ‘EUR ‘; break;
case ‘USD’: $currency_symbol = ‘USD ‘; break;
case ‘AUD’: $currency_symbol = ‘AUD ‘; break;
}
return $currency_symbol;
}