A Christian business person should wisely define what is the mission and hold this before all the employees. Profit in a business is like blood in the body. Every organization needs it to survive and function. But if our blood goes away we stop living. Organizations that state they exist for the purpose of making money are doomed to failure.
Organizations exist to serve customers, and they do so when they provide the customers with value.
The value added to the customer is such that normally the customer will pay a profit. Therefore profit is a legitimate measure of the value the firm is producing for its customers. Without a surplus the firm will not be able to continue to offer the service or to add value. It is legitimate for a Christian to pray for a profit. It should not only be the fact that someone is a Christian that invites the opportunity to witness to Christ, but the evidence of something special in the way business is done that is a sign of the Kingdom.