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Hi Hylton:

Thank you, OM, for giving this problem some thought; I do appreciate your suggestion/comments.

I understand your approach in your suggested solution; however, it does not satisfy my requirements. The numerical data that is entered, or calculated in this situation, within the rows of column [$M] must be reflected, overtime, only at cell $Y$4.  (I may later need to assign a name for cell Y4; something like: /Predicted Remaining Fuel (Gals)/ for use in other, future, calculations).

Perhaps I should have written in my OP that "The formula /presently/ in $Y$4=$M18-$W$4". I expect that that formula, obviously,must be changed to reach a solution to my problem, but "=SUM(M18-$W$4)" does not do it for me. Please note that the updated/reflected numerical data must be displayed only within cell Y4, and not elsewhere. Sorry for any confusion that I may have caused.

I have other Calc spreadsheets that require this same type of numerical data updating.  In 2020 Jan/Feb, I received a workable solution to one of my (bowling scores) spreadsheets; IIRC, it invoked the =INDEX( ) function, i.e., /=INDEX($'2020-21 WINTER SR LEAGUE'.G6:$'2020-21 WINTER SR LEAGUE'.G41,COUNTA($'2020-21 WINTER SR LEAGUE'.G6:$'2020-21 WINTER SR LEAGUE'.G41),1)/, but that has somehow gotten messed up by me and no longer works (another story, which I may soon write about in another thread). I mention =INDEX( ) here because I feel that function, which I still do not understand, may be needed to solve my Y4 updating problem.

Thanks again, OM. 73 de WA2RSX


On 6/13/2021 9:01 AM, Hylton Conacher (ZR1HPC) wrote:
Hi Vince,

On 2021/06/12 17:20, Vince@Verizon wrote:

Using LO vers (x64) on desktop Windows 10 Home (64-bit).

I would greatly appreciate receiving an explanation of a formula or function in Calc that updates the data within cell $Y$4 each time the data in column [M] changes.  The formula in $Y$4 =$M18-$W$4.

[M]                                        [Y]

Row 18 ---------------------->  Row 4
Row 19 ---------------------->  Row 4
Row 20 ---------------------->  Row 4
Row 21 ---------------------->  Row 4
Row 21 ---------------------->  Row 4

 Where is column W in your layout? The below is done on assumption.

A simple sum will do it i.e.:

In cell Y4 insert everything between the "


In cell Y5


In theory you could just drag the formula from cell Y4 down to the bottom and then just change those M reference cell numbers.

Remember that putting a $ before either a letter or number reference of a cell LOCKS that formula i.e. dragging the formula down a column to populate cells below will keep whatever is prefixed with $.

Hope it helps

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