The easiest way would be to copy the contents (15.20GB) of the 80GB E: drive to a temporary area on one of the other drives, then blow away both the 15.2GB and the 56.89GB partitions and reformat that new empty partition as (almost) the full 80GB (as you have those 3 'unknown' partitions at the end of E:
Then obviously copy the 15.2GB back again.
Easy.
No worries, post back with your results, but it looks easy enough; you posting that screenshot made understanding it very easy to see what you wanted to do, without a picture it might have been trickier :)
So you got the rest of the 80GB back ?, nice one; have fun filling up that space :)
I don't take anything to computer stores, have always preferred to do things/learn for myself, no point paying good money to someone who might not know what they're doing.