Multicurrency issues

Hi, I’m using the Premmerce Multi-currency for Woocommerce plugin, where I have set the base currency to be USD (hidden from the user) and the secondary currency to be the Peruvian sol PEN (visible).

The price that is synchronized with Facebook is the dollar with a peruvian sol (PEN) sign.

Example: price in product sheet 10 USD (edition)
price visible to users on the web (40 PEN)
price in facebook shop 10 PEN.

Add the following line of code to show at least dollars as currency, but it doesn’t work
function sv_facebook_for_woocommerce_integration_prepare_product_set_currency( $product_data ) {
$product_data[‘currency’] = ‘USD’;
return $product_data;
}
add_filter( ‘facebook_for_woocommerce_integration_prepare_product’, ‘sv_facebook_for_woocommerce_integration_prepare_product_set_currency’, 10, 1 );