TDS on computer/workstation purchased

Hi,

My company has purchased 6 workstations(computers).vendor has charged for the cost of the workstations(computer) and frieght charges. that cost of computers include installation charges as well i.e. not mentioned separately. my question is whether we are liable to deduct tds on any part..ie freight or ....pls let me know

invoice is like that:

6 workstations @ 17900=107400

Vat @ 12.5%                =     xxx

cess on vat                  =     xxx

freight                        =     more than 20,000/-

total                          =      xxxxxx

PLS LET ME KNOW ON WHAT AMOUNT TDS SHUD BE DEDUCTED. THANKS