Now, it is USD 250 per tonne," said vice-chairman and managing director of the cement-making company N Srinivasan. Elaborating on this, he said the company was prudent as it has coal of about four lakh tonne which can produce 27 lakh tonne of cement clinkers.... " We have four months of stock, but beyond that we are looking at the higher costs of coal.... Companies that are well stocked can rely upon steady production in the coming months," he said." But today, if you step out to buy coal, it