155637

Ram put 1p in one bag,2p in the second bag,4p in the third bag and 8p in the forth bag.
He can make 1p,2p,3p=1 and 2p,4p,5p=4p and 1p,6p=4p and 2p,7p=4p,2p and 1p,8p,9p=8p and 1p,10p=8p and 2p,11p=8p,2p and 1p,12p=8p and 4p,13p=8p,4p and 1p,14p=8p,4p and 2p and finally 15p with 8p,4p,2p and 1p.