What makes Ranbir-Deepika to return money to Tamasha Producers?

Everyone was very excited to see the onscreen chemistry between Ranbir-Deepika after their long break up. We all know Deepika was in very much in love with Ranbir and after their breakup she took much time to heal her wounds. But it looked that all got well when we heard that both the stars decided to work together after a long time in the movie 'Tamasha'. Expectations from Ranbir Kapoor and Deepika starrer movie Tamasha were very high but the film has not done very well at the box office. According to reports Tamasha was sold to the distributors at a very high price because of the golden pairing of Deepika and Ranbir, but that also did not work well like their relation. However, Ranbir kapoor have returned 15 Crores to the producers of Tamasha, UTV and Sajid Nadiadwala so that they do not suffer very high losses.