Toggle the WooCommerce elements (subtotal, total, quantity and add to cart) based on whether the last Collapsible Section is open or not. For use with WooCommerce Gravity Forms Product Addons and Collapsible Sections. The code below can be added to a HTML field in your form.

wc-toggle-gfpa-collapsible.html

<script type="text/javascript">
(function($){

	
	function toggleAddToCart( $form, show ) {
		if ( typeof $form === 'undefined' || !$form.length ) {
			return;
		}
		if ( show !== true ) {
			show = false;
		}
		$form.find('.product_totals, .quantity, button[name="add-to-cart"]').toggle( show );
	}
	
	$(document).ready(function(){
		var $lastSection = $('.gform_variation_wrapper .collapsible-sections-field:last');
		var lastSectionID = $lastSection.attr('id');
		var csDelay;
		$('body').on('click', '.collapsible-sections-field', function(e){
			var $section = $(this);
			clearTimeout(csDelay);
			csDelay = setTimeout(function(){
				var show = ( $section.attr('id') === lastSectionID && $section.data('collapsible-closed') === false );
				toggleAddToCart( $section.closest('form'), show );
			}, 100);
		});
		setTimeout(function(){
			toggleAddToCart( $lastSection.closest('form'), $lastSection.data('collapsible-closed') === false );
		}, 100);
	});

})(jQuery);
</script>