income tax -tds

Our Company provided Sodexho Pass (Food Coupon)to our employees and we receive the bill which includes the amount of food coupon and service charges Suppose if we have ordered food coupon of Rs 10000/- on that the pass service agent charges service chgs of Rs 1000 + service tax chgs Rs 112.36 he provide us the bill for all these amount into one bill amounting to Rs 11,112.36/- my query is that should i have to deduct TDS on the whole amount i.e Rs 11,112.36/- or only on the service charges + service tax i.e Rs 1112.36/-

Regard
kumar