Tips on Customizing Quote Calculator Constructor

How to Hide Quote Calculator Constructor Admin Menus

function plt_hide_quote_calculator_constructor_menus() {
	//Hide the "Calculators" menu.
	remove_menu_page('edit.php?post_type=calculator');
	//Hide the "Calculators → All Calculator" menu.
	remove_submenu_page('edit.php?post_type=calculator', 'edit.php?post_type=calculator');
	//Hide the "Calculators → Add New" menu.
	remove_submenu_page('edit.php?post_type=calculator', 'post-new.php?post_type=calculator');
}

add_action('admin_menu', 'plt_hide_quote_calculator_constructor_menus', 15);

Where do I put this code?

How to Hide Quote Calculator Constructor Meta Boxes

function plt_hide_quote_calculator_constructor_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Calculator Constructor" meta box.
	remove_meta_box('custom_meta_editor_378', $screen->id, 'advanced');
	//Hide the "Calculator Constructor" meta box.
	remove_meta_box('custom_meta_editor_199', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_quote_calculator_constructor_metaboxes', 20);