That's what we need. How much do you lose per day ? Preferably averaged over several days, because no two days are the same.I will test my fc tonight again after coming home from work and see just how much fc I did lose so I will get a better grasp on what I am losing on a daily basis.
Generally speaking though, next week should be similar to this week so we will take the average of the week before you leave, to guess the week you are away. Then we'll add 1 ppm a day extra for wiggle room.