public function get_earnings_by_range( $range = 'today', $day_by_day = false, $start_date = false, $end_date = false, $include_taxes = true ) {
    global $wpdb;

    $this->setup_dates( $start_date, $end_date );

    $this->end_date = strtotime( 'midnight', $this->end_date );

    // Make sure start date is valid
    if ( is_wp_error( $this->start_date ) ) {
      return $this->start_date;
    }

    // Make sure end date is valid
    if ( is_wp_error( $this->end_date ) ) {
      return $this->end_date;
    }

    $earnings = array();

    $cached = get_transient( 'edd_stats_earnings' );
    $key    = md5( $range . '_' . date( 'Y-m-d', $this->start_date ) . '_' . date( 'Y-m-d', strtotime( '+1 DAY', $this->end_date ) ) );
    $sales  = isset( $cached[ $key ] ) ? $cached[ $key ] : false;

    if ( false === $sales || ! $this->is_cacheable( $range ) ) {
      if ( ! $day_by_day ) {
        $select = "DATE_FORMAT(posts.post_date, '%%m') AS m, YEAR(posts.post_date) AS y, COUNT(DISTINCT posts.ID) as count";
        $grouping = "YEAR(posts.post_date), MONTH(posts.post_date)";
      } else {
        if ( $range == 'today' || $range == 'yesterday' ) {
          $select = "DATE_FORMAT(posts.post_date, '%%d') AS d, DATE_FORMAT(posts.post_date, '%%m') AS m, YEAR(posts.post_date) AS y, HOUR(posts.post_date) AS h";
          $grouping = "YEAR(posts.post_date), MONTH(posts.post_date), DAY(posts.post_date), HOUR(posts.post_date)";
        } else {
          $select = "DATE_FORMAT(posts.post_date, '%%d') AS d, DATE_FORMAT(posts.post_date, '%%m') AS m, YEAR(posts.post_date) AS y";
          $grouping = "YEAR(posts.post_date), MONTH(posts.post_date), DAY(posts.post_date)";
        }
      }

      if ( $range == 'today' || $range == 'yesterday' ) {
        $grouping = "YEAR(posts.post_date), MONTH(posts.post_date), DAY(posts.post_date), HOUR(posts.post_date)";
      }

      $statuses = apply_filters( 'edd_payment_stats_post_statuses', array( 'publish', 'revoked' ) );
      $statuses = "'" . implode( "', '", $statuses ) . "'";

      $earnings = $wpdb->get_results( $wpdb->prepare(
        "SELECT SUM(meta_value) AS total, $select
				 FROM {$wpdb->posts} AS posts
				 INNER JOIN {$wpdb->postmeta} ON posts.ID = {$wpdb->postmeta}.post_ID
				 WHERE posts.post_type IN ('edd_payment')
				 AND {$wpdb->postmeta}.meta_key = '_edd_payment_total'
				 AND posts.post_date >= %s
				 AND posts.post_date < %s
				 AND posts.post_status IN ($statuses)
				 GROUP BY $grouping
				 ORDER by posts.post_date ASC", date( 'Y-m-d', $this->start_date ), date( 'Y-m-d', strtotime( '+1 day', $this->end_date ) ) ), ARRAY_A );

      if ( ! $include_taxes ) {
        $taxes = $wpdb->get_results( $wpdb->prepare(
          "SELECT SUM(meta_value) AS tax, $select
					 FROM {$wpdb->posts} AS posts
					 INNER JOIN {$wpdb->postmeta} ON posts.ID = {$wpdb->postmeta}.post_ID
					 WHERE posts.post_type IN ('edd_payment')
					 AND {$wpdb->postmeta}.meta_key = '_edd_payment_tax'
					 AND posts.post_date >= %s
					 AND posts.post_date < %s
					 AND posts.post_status IN ($statuses)
					 GROUP BY $grouping
					 ORDER by posts.post_date ASC", date( 'Y-m-d', $this->start_date ), date( 'Y-m-d', strtotime( '+1 day', $this->end_date ) ) ), ARRAY_A );

        foreach ( $earnings as $key => $value ) {
          $earnings[ $key ]['total'] -= $taxes[ $key ]['tax'];
        }
      }

      return $earnings;
    }
  }