The assessee owns a printing press and supplies printed materials in the shape of envelopes, examination papers, certificates, result sheets, etc. In the assessment year 1972-73, it entered into an agreement with the Madhyamik Shiksha Mandal, Madhya Pradesh, Bhopal, for the supply of examination papers, mark sheets, certificate, etc. , in sealed envelopes and packages. Under the terms of the agreement they were to be prepared in accordance with the needs of each examination centre and were to be packed in sealed envelopes and put in boxes, and despatched to the examination centers notified by the Board. In the event of excess number of examination papers being printed by the assessee they were to be sent in a likewise manner to the Board Office. The agreement further stipulated that till such time that the examinations were over the assessee was to maintain secrecy about the contents of the papers, and in the event of a breach by the assessee he will be liable for damages and imposition of such penalty as the Secretary of the Board might determine. A schedule of rates for payment to the assessee was set out along with the agreement. Under the first heading, charges for co