WooCommerce - Conditional check box and fee

CMS & WordPress
1

I know only a little bit of PHP and am stuck on this. I am customizing a WP site running Woocommerce. I have added some snippets that I found on the internet to add a check box to the checkout page. I need it to charge a fee when the check-box is marked. So basically, customers can add a card to their order for 0.75. They check the box if they want the card, and the fee needs to then be added to the cart. I have the boxes showing up, but can’t get the fee to add to the cart. Can someone help me?

This is working to add the extra fields to checkout:

add_action('woocommerce_after_order_notes', 'gift_wrapping_field');

function gift_wrapping_field( $checkout ) 
{

woocommerce_form_field( 'gift_wrapping', array(
    'type'          => 'checkbox',
    'class'         => array('input-checkbox'),
    'label'         => __(' Include a card for the recipient of my gift purchase (additional $0.75) '),
    'required'        => false,
    ), $checkout->get_value( 'gift_wrapping' ));
  
woocommerce_form_field( 'gift_card_name', array(
    'type'          => 'text',
    'class'         => array('gift-card-text'),
    'label'         => __(' Name of recipient: '),
    'required'        => false,
    ), $checkout->get_value( 'gift_card_name' ));
}

This is the code I am using to try to have the fee in the cart when the check box is selected, but its not working (adapted from here:http://www.remicorson.com/add-custom-fee-to-woocommerce-cart-dynamically/):

/**
 * WooCommerce Extra Feature
 * --------------------------
 *
 * Add custom fee to cart automatically
 *
 */
function woo_add_cart_fee() {
 
  global $woocommerce;
  
  if( get_option('gift_wrapping') == 'value' ) { $woocommerce->cart->add_fee( __('Gift Card', 'woocommerce'), 0.75 );
    
}
add_action( 'woocommerce_cart_calculate_fees', 'woo_add_cart_fee' );

Could someone kindly explain to me how to get this working properly? Thank you!

2

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