Tanvika went to a hotel in a town with her big family. They consumed 23 idlies, ISpoories, 7 dosas and 19 vadas. the bill was Rs. 108. Next day they consumed 34 idlies, 8 vadas, 22 poories and 7 dosas. The bill came to Rs. 114 if one idilie cost same as vada. What is the cost of one poori ?