Can I make this stored procedure faster - sql

Question

I have the stored procedure below. This stored procedure runs in 3-4 seconds even on my developer computer but on the server it takes 15-20 seconds. I tried to change some of subqueries to cross apply and some to outer apply. But it caused to take more longer time.
#startDate datetime ,
#endDate datetime ,
#customerId int
;WITH t1(Plate,UsedFuelTypeUID,RemainingBefore,DateRangeTotal,DateRangeTransactionsTotal,RemaininCurrent) AS
(
select
v.Plate, v.UsedFuelTypeUID,
isnull((select isnull( sum(vls1.FT_TotalLimit),0)
from VehicleChildLog vls1
where vls1.VehicleChildId =v.VehicleID and vls1.UpdateDate < #startDate
),0)-
isnull((select isnull( sum(t1.Liter),0) from Transactions t1
where t1.VehicleChildID=v.VehicleID and t1.SaleDate <#startDate
),0)as RemainingBefore,
sum(vl.FT_TotalLimit) DateRangeTotal,
isnull((select isnull( sum(t1.Liter),0) from Transactions t1
where t1.VehicleChildID=v.VehicleID and t1.SaleDate between #startDate and #endDate
),0) as DateRangeTransactionsTotal,
(v.FT_TotalLimit - v.FT_UsedTotalLimit) as RemainingCurrent
from VehicleChildLog vl
inner join VehiclesChild v on vl.VehicleChildId = v.VehicleID
where vl.CustomerChildID = #customerId and vl.UpdateDate between #startDate and #endDate
group by
v.VehicleID, v.Plate, v.UsedFuelTypeUID
,v.FT_TotalLimit - v.FT_UsedTotalLimit
)
select *, t1.RemainingBefore+t1.DateRangeTotal-t1.DateRangeTransactionsTotal as RemainingAfter from t1 ;
Table structure is below
[Transactions]
(
[TransactionID] [int] IDENTITY(1,1) NOT FOR REPLICATION NOT NULL,
[SaleDate] [datetime] NULL,
[Liter] [float] NULL,
[VehicleChildID] [int] NULL
...
)
[VehiclesChild]
(
[VehicleID] [int] IDENTITY(1,1) NOT NULL,
[CustomerChildID] [int] NULL,
[Plate] [varchar](16) NULL,
[UsedFuelTypeUID] [int] NULL,
[FT_TotalLimit] [float] NULL,
[FT_UsedTotalLimit] [float] NULL
...
)
[VehicleChildLog]
(
[VehiclesChildLogId] [int] IDENTITY(1,1) NOT NULL,
[VehicleChildId] [int] NOT NULL,
[CustomerChildId] [int] NOT NULL,
[FT_TotalLimit] [float] NULL,
[FT_UsedTotalLimit] [float] NULL,
[UpdateDate] [datetime] NULL
...
)