I'm sorry, but math is not my forte and I can't even think what I need to do
for this. I have a montly bill (every four weeks) that is split between a
certain number of people (right now it's 10), but if an individual is absent
for a period of time (weekly incements), their dues are deducted, but the
others have to pick up the slack so that the total bill is covered. Is there
anyone that can help me with a formula for this problem?