Sum Issue - I can't find the right formula

[Trevor G]

I have the following table which shows Data, Numbers, Count and a Total column.

What I am trying to work out is that the Total Column has to look to sum the cells in the number column but where the Count Column shows a number and sum the cells above, I can do this manually with a normal Sum, but I have thousands of Rows to look at, and the Sum isn't a fixed position.

The example below includes the Sum but I used a basic sum to achieve this.

Excel Workbook
	C	D	E	F
1	Data	Numbers	Count	Totals
2	John	1
3	Sarah	2
4	Allan	1
5	Big	2
6	Allow User	1	10	7
7	John	1
8	Sarah	2
9	Allan	1
10	Big	1
11	Allow User	1
12	John	2
13	Sarah	2
14	Allan	1	34	11
15	Big	1
16	Allow User	1
17	John	1
18	Sarah	1
19	Allan	1
20	Big	1
21	Allow User	1	11	7
Sheet1

 

[Sal Paradise]

What's the logic as to how many rows you need to sum? Without that, we'd have to look for the previous blank and sum everything between, which would be a giant waste of processing over thousands of rows.

 

[markmzz]

Maybe this:

<b>Excel 2007</b><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><colgroup><col width="25px" style="background-color: #E0E0F0" /><col /><col /><col /><col /></colgroup><thead><tr style=" background-color: #E0E0F0;text-align: center;color: #161120"><th></th><th>A</th><th>B</th><th>C</th><th>D</th></tr></thead><tbody><tr ><td style="color: #161120;text-align: center;">1</td><td style="font-weight: bold;;">Data</td><td style="font-weight: bold;text-align: center;;">Numbers</td><td style="font-weight: bold;text-align: center;;">Count</td><td style="font-weight: bold;text-align: center;;">Totals</td></tr><tr ><td style="color: #161120;text-align: center;">2</td><td style=";">John</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">3</td><td style=";">Sarah</td><td style="text-align: center;;">2</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">4</td><td style=";">Allan</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">5</td><td style=";">Big</td><td style="text-align: center;;">2</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">6</td><td style=";">Allow User</td><td style="text-align: center;;">1</td><td style="text-align: center;;">10</td><td style="text-align: center;;">7</td></tr><tr ><td style="color: #161120;text-align: center;">7</td><td style=";">John</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">8</td><td style=";">Sarah</td><td style="text-align: center;;">2</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">9</td><td style=";">Allan</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">10</td><td style=";">Big</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">11</td><td style=";">Allow User</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">12</td><td style=";">John</td><td style="text-align: center;;">2</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">13</td><td style=";">Sarah</td><td style="text-align: center;;">2</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">14</td><td style=";">Allan</td><td style="text-align: center;;">1</td><td style="text-align: center;;">34</td><td style="text-align: center;;">11</td></tr><tr ><td style="color: #161120;text-align: center;">15</td><td style=";">Big</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">16</td><td style=";">Allow User</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">17</td><td style=";">John</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">18</td><td style=";">Sarah</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">19</td><td style=";">Allan</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">20</td><td style=";">Big</td><td style="text-align: center;;">1</td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">21</td><td style=";">Allow User</td><td style="text-align: center;;">1</td><td style="text-align: center;;">11</td><td style="text-align: center;;">7</td></tr><tr ><td style="color: #161120;text-align: center;">22</td><td style="text-align: right;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">23</td><td style=";">********</td><td style="text-align: center;;">********</td><td style="text-align: center;;">********</td><td style="text-align: center;;">********</td></tr></tbody></table><p style="width:3.6em;font-weight:bold;margin:0;padding:0.2em 0.6em 0.2em 0.5em;border: 1px solid #A6AAB6;border-top:none;text-align: center;background-color: #E0E0F0;color: #161120">Sheet1</p><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Array Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">D2</th><td style="text-align:left">{=IF(<font color="Blue">C2="","",SUM(<font color="Red">INDEX(<font color="Green">B$1:B1,MAX(<font color="Purple">(<font color="Teal">C$1:C1<>""</font>)*ROW(<font color="Teal">C$1:C1</font>)</font>)+1</font>):B2</font>)</font>)}</td></tr></tbody></table><b>Entered with Ctrl+Shift+Enter.</b> If entered correctly, Excel will surround with curly braces {}.
<b>Note: Do not try and enter the {} manually yourself</b></td></tr></table><br />
Markmzz

 

[markmzz]

Another way:

=IF(C2="","",SUM(B$2:B2)-SUM(D$1:D1))

Markmzz

 

[Trevor G]

Sal Paradise, The data is a download that is presented and looks to show numbers at scheduled intervals, so every shedule it provides a count and what is needed is a total of the Numbers to each count (the count is irrelevant but marks the entry where totals have to be applied). To the normal eye it doesn't seem a logic is applied, but the system where the data comes from is not editable so we get a daily download and have to improvise and provide some results.

Markmmz you have provided the solution and it works very well, thank you. I have used the Array formula.

 

[Sal Paradise]

Another way:

=IF(C2="","",SUM(B$2:B2)-SUM(D$1:D1))

Markmzz

Brilliant formula. Wow! Nice job. I feel dumb for not thinking of that. Kudos!

 

[markmzz]

Markmmz you have provided the solution and it works very well, thank you. I have used the Array formula.

Trevor G,

Thanks for the feedback.

Markmzz