Over an entire series of DOND, does anyone know if you put the total amount paid out over the series against the total figure for the final rejected offer in each game, whether the banker or the contestants win?

Has this ever been calculated or revealed?

i reckon the banker would win because of the high amounts sold to him

The total of all boxes to have been on the table since show 1 currently stands at around £9.8 million. Compare that with £12.5 million offered by the Banker, and £7.2 million won by the contestants. So, statistically, the Banker's winning overall by quite a large margin.