Month Potato Prices 2 year average price for each month. 2 year annual average price   Seasonal Index
2012 2013
Jan. 950 2100 1525 2212 76.25
Feb. 917 1900 1408 2212 70.40
Mar. 1000 1800 1400 2212 70.00
Apr. 983 1900 1441 2212 70.70
May 1700 1900 1800 2212 90.00
Jun 2142 2000 2071 2212 103.55
July 2567 2500 2573 2212 128.65
Aug 3917 2100 2508 2212 125.40
Sept 2725 2400 2562 2212 128.10
Oct 2458 3500 2676 2212 133.80
Nov 2483 5700 4091 2212 204.55
Dec 1283 3700 2491 2212 124.55
Table 6: Simple average seasonal index for potato.