With lessons from prior failed attempts at co-operation in mind, they designed the now famous Rochdale Principles, and over a period of four months they struggled to pool one pound sterling per person for a total of 28 pounds of capital. On December 21, 1844, they opened their store with a very meagre selection of butter, sugar, flour, oatmeal and a few candles. Within three months, they expanded their selection to include tea and tobacco, and they were soon known for providing high quality, unadulterated goods.