Aggregate function and join

Question

I have three Tables(Emptimesheet,comexpensetable,perexpensestable).I want to show otput something like below,
EmpID,EmpName,StartDate,EndDate,Total,Chotel,CAirfare,Cfuel,WeeklCompanyExpenses,Percompanyexpenses
rightnow in the below query I don't have hotel,airfare,fuel.
select distinct(e.EmpID) ,e.EmpName, e.StartDate,e.EndDate,e.Total,c.WeeklyComtotalExpenses,p.WeeklyPerTotalExpenses
from EmpTimeSheet e left JOIN ComExpensesTable c on c.CExpID=e.EmpID left join PerExpensesTable p ON p.PExpID=e.EmpID
Output for Above query .
EmpID name sd ED Total companEx PerExpense 1 tom 2014-02-02 00:00:00.000 2014-02-08 00:00:00.000 28:30:0 213.00 199.00
3 nick 2014-03-02 00:00:00.000 2014-03-08 00:00:00.000 15:20:0 16.00 NULL
4 john 2014-03-23 00:00:00.000 2014-03-29 00:00:00.000 42:0:0 NULL NULL
5 test 2014-03-09 00:00:00.000 2014-03-15 00:00:00.000 34:15:0 NULL NULL
6 ema 2014-04-13 00:00:00.000 2014-04-19 00:00:00.000 39:0:0 16.00 NULL
Output  Emptimesheet
id empname startdate enddate .. total 1 tom 2014-02-02 00:00:00.000 2014-02-08 00:00:00.000 Thurs 2014-02-06 00:00:00.000 Travel Time 28:30:0
3 nick 2014-03-02 00:00:00.000 2014-03-08 00:00:00.000 Mon 2014-03-03 00:00:00.000 Onsite/WalkTesting 40:0:0
4 john 2014-03-23 00:00:00.000 2014-03-29 00:00:00.000 Mon 2014-03-24 00:00:00.000 Onsite/WalkTesting 42:0:0
5 test 2014-03-09 00:00:00.000 2014-03-15 00:00:00.000 Mon 2014-03-10 00:00:00.000 Travel Time , 34:15:0
6 ema 2014-04-13 00:00:00.000 2014-04-19 00:00:00.000 Mon 2014-04-14 00:00:00.000 Equipment Testing 39:0:0
output for ComExpenseTable 
CExpID airfare hotel weeklycomexpensetable 1 45.00 34.00 213.00
3 5.00 3.00 16.00
6 5.00 3.00 16.00
output  for  Perexpensetable
PExpID PerExpenseTable1 Sun 2014-02-02 00:00:00.000 199.00
2 Sun 2014-02-23 00:00:00.000 199.00
below  query for sum of indivial expense in company table
select sum(CHotel) as Hotel ,sum(CTransport) as Airfare,sum(CMeals) as Meals,sum(CFuel) as Gas,sum(CTolls),Sum(CParking) as Parking,Sum(CMisc) as Misc ,sum(CMileage) as Mileage from ComExpensesTable where CExpID=1
Now  I want  to add  sum of hotel,transport ..  to  the below query  .I don't  know how  to do this.Any suggestions please?
select distinct(e.EmpID) ,e.EmpName, e.StartDate,e.EndDate,e.Total,c.WeeklyComtotalExpenses,p.WeeklyPerTotalExpenses
from EmpTimeSheet e left JOIN ComExpensesTable c on c.CExpID=e.EmpID left join PerExpensesTable p ON p.PExpID=e.EmpID

Answer 1

select
distinct(e.EmpID) ,
e.EmpName,
e.StartDate,
e.EndDate,
e.Total,
ee.Hotel,
ee.Airfare,
c.WeeklyComtotalExpenses,
p.WeeklyPerTotalExpenses
fromEmpTimeSheet e
left JOIN (select CExpID, sum(CHotel) as Hotel ,sum(CTransport) as Airfare,
sum(CMeals) as Meals,sum(CFuel) as Gas,sum(CTolls),
Sum(CParking) as Parking,Sum(CMisc) as Misc ,
sum(CMileage) as Mileage from ComExpensesTable group by CExpID) cleft join // don't need the "left join" hereon c.CExpID=e.EmpID //error
left join PerExpensesTable p ON p.PExpID=e.EmpID