/// Custome Total Pirce Rule
function custom_calculated_total( $total, $cart ){
   if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;

	$coupons_50_price = array('sha001', 'sha002', 'sha003', 'sha004', 'sha005');  // Add add full list here
	$coupons_100_price = array('sha301', 'sha302', 'sha303', 'sha304', 'sha305'); // Add add full list here
	$coupons_200_price = array('sha601', 'sha602', 'sha603', 'sha604', 'sha605'); // Add add full list here

    $applied_coupons = WC()->cart->get_applied_coupons();
    if($applied_coupons) {
            if(in_array($applied_coupons[0] , $coupons_50_price)) {
                        if( $total >= 50 && $total <= 100 ){
                        return 50;
                    }
                }
            if(in_array($applied_coupons[0] , $coupons_100_price)) {
                        if( $total >= 100 && $total <= 200 ){
                        return 100;
                    }
                }
            if(in_array($applied_coupons[0] , $coupons_200_price)) {
                        if( $total >= 200 && $total <= 300 ){
                        return 200;
                }
            }
              
        }
    else {
            return $total;
        }     
}

add_filter( 'woocommerce_calculated_total', 'custom_calculated_total', 30, 2 );