please help me explain

Table 4. Producer price indexes and percent changes for selected commodity groupings by final demand category (1962-100, unless otherwise indicated Conny Group reldes changes Fol Sony ww 2014 change from ha Feb 2015 2012 2014 No De 2013 2014 De Feb demand Frand good 100,7 1008 60 01 0.1 oa Fard de 10 112.5 1829 06 0. 04 04 04 1400 1173 hd more! 12 011 06 03 04 10 . rhwd dry wees? 1240 1242 1235 02 0.1 28 01.13 Gran 2000 1902 1008 138 -134 69 101 13 YTT 114 1 Zach, a Fecent Penn State grad, was back on campus to discuss the challenges he faced as a buyer for Kellogg's Corn Flakes during the 2012-2014 period. The year 2012 was significant for a tremendous drought season. Grain prices skyrocketed as crop yields diminished. Then, during 2013-2014, farmers rebounded and just the opposite happened. Prices for corn and grains plummeted as the harvest was excellent. The PPI table above reflects this price volatility (fluctuations) as year over year PPI was % for grains. D-13.4% 181.4 Correct Answer -32.3% You Answered 2.5%