TATA Motors reported 3% decline in its total sales in June this year at 64,341 units. The company's domestic sales of commercial and passenger vehicles for the month declined by 5% to 58,270 units against 61,266 units in June last year. TATA Motors' sales of commercial vehicles in June 2012 in the domestic market stood at 41,026 units compared to 39,272 units sold in June last year, up 4%. It added that…