Do you a person that need to appear in more than one social media? If yes, you definitely need a powerful smart phone. But do you ever think how to buy a new and fancy smart phone without need an extra effort? Well, you should take a train then.
By the way, I got some notes on the illustration since the farthest distance rates on CommuterLine is actually Rp. 7000 (from Bogor to Maja). So the roundtrip rates is max Rp. 14.000
But another opinion comes from Robert Sidauruk, he said that the 15 millions rupiah is a reasonable cost for privilege that you can get by driving your own car hihihihi