伙计们，你们能帮我建立一个合适的mysql select与以下这些选择的连接吗？
我的选择如下所示：

SELECT budget as budget from projects where id =96
SELECT sum(value) as expenses from expenses where project_id =96 
SELECT sum(estimated_hours * t2.man_hour) as estimated from project_has_tasks t1 left join 
users t2 on t1.user_id = t2.id where project_id =96
SELECT sum(TIME_FORMAT(SEC_TO_TIME (time_spent),'%k.%i' )
* t2.man_hour) as time_spent_cost FROM project_has_tasks t1
left join users t2 on t1.user_id = t2.id where t1.project_id ='96'

他们工作正常，但我想达到一个结果，如：

| budget | expenses  | estimated | time_spent_cost |
____________________________________________________
| 298833 |   24234   |  4434333  |   343434        |

无论如何，我刚刚建立了一个公共选择，但它不能正常工作（不正确的总和…）

SELECT t1.project_id, t3.budget, 
IFNULL(sum(t4.value),0) as additional_costs, 
IFNULL(sum(estimated_hours)* t2.man_hour ,0) 
as estimated_hours_costs, 
IFNULL(TIME_FORMAT(SEC_TO_TIME 
(sum(t1.time_spent)),'%k.%i' )* t2.man_hour,0) 
as time_spent_cost, NOW() 
FROM project_has_tasks t1 left join 
users t2 on t1.user_id = t2.id left join 
projects t3 on t1.project_id = t3.id 
left join expenses t4 
on t1.project_id = t4.project_id 
WHERE t1.project_id ='96' group by t1.project_id

谢谢你的帮助。