Bharti Airtel own assessment of adjusted gross revenue (AGR) dues is nearly a third of the government's as it has taken into account certain deductions the telecom department had initially refused and also duplicated entries, among other discrepancies, a person familiar with the matter said. Airtel has self-assessed its AGR dues at Rs 13,004-crore, compared with nearly Rs 40,000-crore as calculated by the DoT.