Mark,
Thank you for replying. I had no idea that we needed to subtract calories lost due to vomiting from the daily intake. As I indicated in my reply to Brian, nutrition has been a real struggle and fight.
Including the calories lost as a result of vomiting, calorie intake was probably 400 per day for a about 4 months following end of treatments.
After having read the other replies, it seems to make sense that the poor nutrition in conjunction with radiation sickness and the use of painkillers have contributed to the 0 energy level, the weight loss and the general feeling of not being well.
As a matter of fact, a few days ago on one of those really bad days, my family members said to me that this was no way of living. I keep saying "Hang in there" as things will get better.