Top N percent Desc and Top M percent Asc - sql-server

Question

I am trying to get top 5 customertypes and show data for each 5 customer types, The balance (which can be any amount) I show them as "Other Customer Types". my issue is since the rows can be random and not perfectly divisible by a number then there can be repeated values in the top 5 showing up in the "Other" group which overstates the Total sales.
the Data is also being rendered in SSRS
My code using TOP PERCENT:
select final.[description], sum(final.YTDSales$) as YTDSales$
FROM(
select top 25 percent pytd2.[Description], sum(pytd2.YTDSales$) as YTDSales$
FROM(
-- ytd sales
select re.SIC_Desc as [description], sum((ol.NetAmt - ol.WhlOrdDiscAmt) / #exrt) AS YTDSales$
from dbo.order_line_invoice ol
INNER JOIN dbo.Vendor vd ON ol.Cono = vd.Cono AND vd.VendId = ol.VendId
inner join Product_Warehouse pw on ol.ProdId = pw.prodid and ol.WhseId = pw.whseid and ol.cono = pw.cono
inner join Customer c on ol.custId = c.CustId and ol.Cono = c.Cono
left join MDData.dbo.RetailEnvironment re on c.SIC = re.SIC
where ol.InvoiceDate BETWEEN #FStartDate AND #EndDate AND ol.Cono = 1 and ol.VendId IN(#Vendid) and ol.prodcatid NOT LIKE 'GP%'
group by re.SIC_Desc
)PYTD2
group by pytd2.[description]
order by sum(pytd2.YTDSales$) DESC
UNION ALL
select top 75 percent 'Other' as 'description', sum(pytd.YTDSales$) as YTDSales$
FROM(
-- ytd sales
select re.SIC_Desc as [description], sum((ol.NetAmt - ol.WhlOrdDiscAmt) / #exrt) AS YTDSales$
from dbo.order_line_invoice ol
INNER JOIN dbo.Vendor vd ON ol.Cono = vd.Cono AND vd.VendId = ol.VendId
inner join Product_Warehouse pw on ol.ProdId = pw.prodid and ol.WhseId = pw.whseid and ol.cono = pw.cono
inner join Customer c on ol.custId = c.CustId and ol.Cono = c.Cono
left join MDData.dbo.RetailEnvironment re on c.SIC = re.SIC
where ol.InvoiceDate BETWEEN #FStartDate AND #EndDate AND ol.Cono = 1 and ol.VendId IN(#Vendid) and ol.prodcatid NOT LIKE 'GP%'
group by re.SIC_Desc
)PYTD
group by Ppytd.[description]
order by sum(pytd.YTDSales$)
)final
group by final.[Description]
order by sum(final.YTDSales$) DESC
my results:
As you can see the Large Independent and Other has the same figure of $2280.60 in YTDQty since it is being repeated

Answer 1

I was picturing something like this:
with data as (
-- your base query here grouped and summarized by customer type
), rankedData as (
select *, row_number() over (order by YTDSales$ desc) as CustTypeRank
from data
)
select
case when CustTypeRank <= 5 then min("description") else 'Others' end as "description",
sum(YTDSales$) as YTDSales$
from rankedData
group by case when CustTypeRank <= 5 then CustTypeRank else 999 end
order by case when CustTypeRank <= 5 then CustTypeRank else 999 end

Answer 2

I actually used RANK instead which worked great :-
select 0 as rankytd, RANK() OVER(ORDER BY sum(ol.NetAmt - ol.WhlOrdDiscAmt) DESC) as rankpytd, re.sic, ol.VendId, vd.name, re.SIC_Desc As [description], 0 AS YTDQty, sum(ol.Quantity) AS PYTDQty
from dbo.order_line_invoice ol
INNER JOIN dbo.Vendor vd ON ol.Cono = vd.Cono AND vd.VendId = ol.VendId
inner join dbo.Product p on ol.Cono = p.Cono and ol.prodid = p.ProdId and p.ProdCatId in (#pcat)
inner join Product_Warehouse pw on ol.ProdId = pw.prodid and ol.WhseId = pw.whseid and ol.cono = pw.cono
inner join Customer c on ol.custId = c.CustId and ol.Cono = c.Cono
left join MDData.dbo.RetailEnvironment re on c.SIC = re.SIC
where ol.InvoiceDate BETWEEN DATEADD(YEAR, -1,#FStartDate) AND DATEADD(YEAR, -1, #EndDate) and ol.Cono = 1 and ol.VendId IN(#Vendid) and ol.prodcatid NOT LIKE 'GP%'
group by re.sic, ol.VendId, vd.Name, re.SIC_Desc