The context of the following conversation is Jan had no money when Jordan invited him to dinner.  Therefore, Jordan paid Jan's share.:
Jordan says Here, let me pay for your meal..
The friend responds No Jordan, I can pay for my own meal..
Jordan responds No really, you were kind enough to pay for me when  I had no money..
The friend responds Well that is really sweet of you, thanks..
Jordan responds It is the least I can do..
The friend responds Well next time we can just go halves..