Hi Moni,

Please add the custom code below. (How to add custom code? ↗):

add_action( 'wp_footer', function () {
	?>
	<script type="text/javascript">
        (function($) {
            (function($) {
                $(document).on('wpcpq_init_table', function(e, $table, total, qty) {
                    var ori_price = parseFloat($table.data('o_price'));
                    var ori_total = ori_price * qty;

                    if (ori_total > total) {
                        if ($table.find('.wpcpq-saved').length) {
                            $table.find('.wpcpq-saved').html('(Saved: ' + wpcpq_format_price(ori_total - total) + ')');
                        } else {
                            var saved = '<span class="wpcpq-saved" style="color: green; margin-left: 10px; font-weight: 400">(Saved: ' +
                                wpcpq_format_price(ori_total - total) + ')</span>';

                            $table.find('.wpcpq-summary-total').append(saved);
                        }
                    } else {
                        $table.find('.wpcpq-saved').remove();
                    }
                });
            })(jQuery);
        })(jQuery);
	</script>
	<?php
}, 99 );

The result will be like this:

You should display "saved per unit" on the board to avoid confusing customers, as they may change the quantity to something different from what's shown there.

Please configure the snippet like that: