On Sun, 14 Feb 2010 15:19:02 -0800, Spikey
wrote:

Every Saturday I record the readings from my Electricity & Gas meters in a
spreadsheet which I use to calculate that weeks usage.
Week 1 reading for Gas goes into Cell E10, week 2 into E11 Week 3 into E12
and so on through to week 52.
In cell F11 I have put the function =(E11-E10) and filled down this formula
down the column which produces the number of units used that week.
After 52 weeks I use Auto-sum to give a total for the year.
I do the same for Electric
On sheet 2 of the workbook I have set up a calculator that takes the value
from column F each week, and using the conversion calculation provided by the
power company to convert Units to Kilowatt hours and then multiply this by
the cost per KwH. Standing charges and taxes are also added at the
appropriate stage, giving a final total cost for the energy used each week.
At present I have to copy the weekly unit used into the calculator manually.
The figure is copied from column F and pasted into Cell D10 in the calculator.
What I want to know is, is it possible to put a function in Cell D10 in the
calculator so that the Units used figure is placed there automatically each
week? If the Cell Address remained constant it would be simply a matter of
putting ='Meters-10'!F16 in Cell D10 but as the following weeks reading would
be in F17 this would not work. How do I tell Excel to use the value in the
latest row in column F?


=LOOKUP(1E+307,'Meters-10'!F:F,'Meters-10'!F:F)

--ron