Compute Balance

I have below query and want to display Balance.

Declare @frDate Date
set @frDate = '2022/08/18'
Declare @toDate Date
set @toDate = '2022/08/18'
Select T0.code,
(select sum (Credit-Debit) from J1 where refdate <= @frDate and name = T0.Code)
- (select Amount from Customer where code = T0.Code) 'Opening Balance',
(Select sum(Amount) from order A0 where A0.code = T0.code and A0.date between @frDate and @toDate) 'Sales',
(Select sum(value) from Pay A0 where A0.code = T0.code and A0.date between @frDate and @toDate) 'Payment'
from order T0 inner join Customer t1
on T0.code = t1.Code where
and T0.Date between @frDate and @toDate
group by T0.Code

Thanks