Prices fell by up to Rs 300 per quintal at the wholesale grains market owing to slackened demand against adequate stocks position. In Delhi rice basmati, common and Pusa- 1121 variety slipped to Rs 7,100-7,200 and Rs 5,900-6,500 from previous levels of Rs 7,400-7,500 and Rs 6,000-6,800 per quintal, respectively.