Tewi's logic of the fly and the trought are actually true here in the real world. It's the same concept as selling off your car in order to invest it on stocks (i.e. Mutual Fund) and wait for the stocks to grow.
I have a friend who sold his car back in 2008 when there was a global recession in order to buy mutual fund stocks. Fast forward now, the worth of his money has now tripled! What a lucky guy.
Same goes here with Tewi, she may lose her 10k yen but her reputation would go up. A sure fire investment for future prospects.
I thought you were a frugal rabbit, but...I might not have a lot of power, but I have some money....And, how about it?You must lose a fly to catch a trout.I'll wait for 2 hours. That's the limit of my patience.In return, I want you to release that girl.With it, Rumia, I'll buy you three days worth of meat.Let's trade.My reputation affects business.You are rather kind.