well, actually,when using a bulk system is pretty easy, i print 24 hrs for 7 straight days for example,(300 mts x 1.6 witdht per day ,around 8, 830 hours each), i always keep bulksystem full.
Im using Inktec's 600ml per color (CCMMYYKK) so its 1,2 liters per color while using dual slot.
If you...