Siliguri: A five-member team from the Calcutta-based Institute of Cost & Works Accountants of India (ICWAI) is in north Bengal now to assess the cost involved in the cultivation of tealeaves and the production of made tea. "Assessing the costs incurred by the stakeholders of tea industry is essential while deciding on policies and schemes,' said Amal Roy Choudhury, the deputy director (plantations) of the Tea Board of India. "The team is here to determine separately the costs of production in the Terai, Dooars, and Darjeeling.'