Cacher is the code snippet organizer for pro developers

<?php
/**
 * Gravity Wiz // Gravity Forms // Display Price for Drop Down and Radio Button Product Fields
 * http://gravitywiz.com/
 * Source: https://www.gravityhelp.com/documentation/article/gform_field_choice_markup_pre_render/#2-include-price-for-product-fields
 */
add_filter( 'gform_field_choice_markup_pre_render', function ( $choice_markup, $choice, $field, $value ) {

	if ( $field->type == 'product' ) {
		$new_string = sprintf( '>%s - %s<', $choice['text'], GFCommon::to_money( $choice['price'] ) );
		return str_replace( ">{$choice['text']}<", $new_string, $choice_markup );
	}

	return $choice_markup;
}, 10, 4 );