Edit: Don't have data to test, but something like this should do it.
SELECT tn.ID,ca.Client,tn.TxDate,tn.GrossCost
FROM table_name tn
CROSS APPLY (
SELECT tn.Client AS Client
UNION ALL
SELECT 'LEN'
WHERE tn.Client = 'Dest'
UNION ALL
SELECT 'ghi'
WHERE tn.Client = 'Dest'
UNION ALL
SELECT 'tab'
WHERE tn.Client = 'Dest'
) AS ca
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".