How to make eloquent query with 2 table and two from

Hello everyone, I have no idea, how do this query with eloquent for get object.

SELECT field1, field3, total
	FROM (SELECT field1, field3, sum(field2) AS total
  FROM sales
  GROUP BY field1, field2
 ) subtable
		GROUP BY field1;

I mean how can I do "subtable" table after join two tables then do group by, min and group_concat and etc ... with this result.

In this one query I do "virtual" table "subtable" then do select with some rules for this table.

How can do this way through eloquent?

P.S. Maybe it help for anyone

$query1 = DB::table(DB::raw('(' . $query1->toSql() . ') as tab1'))

looking for in google - "subquery"