If you get two people to volley a tut from 1k to 600b, they will each make 100b profit and you can hire the tutor off the keeper. Assuming they're giving you a bento each for that dvp, you get 2 bentos for a 600b tutor which can be stripped for 1 bento, netting you a profit of 1 bento. This is known as the +1 method of dvp and is very beneficial. Values of ts and dvp should be balanced in theory... But if an inbalance exists, you can exploit that difference. E.g. If ts is cheap, you can do dvp and get your tutors stripped cheaply, allowing you to keep most of what you got for the volley.
If you do a 1 on 1 dvp of a 600b tutor. Your partner makes 100b and you also make 100b + they give you a bento + you keep the tutor (which would cost you 360b to drop) But if someone is selling 1T ts for a bento, you can get that 600b tutor done for 24c and profit 16c+100b Or just pay the bento for the ts and you make 100b profit.