I’m pretty sure the answer would be 22,000 considering that have 10,000 pounds of food on hand, and every other week they receive 3,200 pounds of more food so that would be 3x 3,200= 9,600 because that is half of 6 weeks and every week of six weeks they receive 400 pounds of more food so 6x400 = 2,400
9,600+2,400=12,000 + 10,000 =22,000 pounds of food.