Format USD Currency

function pw_edd_custom_currency_format( $formatted, $currency, $price ) {

	return $price . ' USD';

}

add_filter( 'edd_usd_currency_filter_before', 'pw_edd_custom_currency_format', 10, 3 );

add_filter( 'edd_usd_currency_filter_after', 'pw_edd_custom_currency_format', 10, 3 );