"The award of a contract, whether it is by a private party or by a public body or the State, is essentially a commercial transaction. In arriving at a commercial decision considerations which are paramount are commercial considerations. The State can choose its own method to arrive at a decision. It can fix its own terms of invitation to tender and that is not open to judicial scrutiny. It can enter into negotiations before finally deciding to accept one of the offers made to it. Price need not always be the sole criterion for awarding a contract. It is free to grant any relaxation, for bona fide reasons, if the tender conditions permit such a relaxation. It may not accept the offer even though it happens to be the highest or the lowest. But the State, its corporations, instrumentalities and agencies are bound to adhere to the norms, standards and procedures laid down by them and cannot depart from them arbitrarily. Though that decision is not amenable to judicial review, the court can examine the decision-making process and interfere if it is found vitiated by mala fides, unreasonableness and arbitrariness."