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# Re: [libreoffice-users] Sum of multiple cells substring

```Hi again,
```
I modified the formula to suit my spreadsheet to {=SUM(IF(LEFT(B46:AE46,2)="OT",VALUE(MID(B46:AE46,3,99)),0))}. It works beautifully but, in some instances it will render an Err:502.
```One of said instances is this:
```
OT8 HF8 OT8 OT2 OT1 OT0,5 OT8 OT8 OT8 OT5 OT6 OT5 OT6 OT5 OT5 OT8 OT5 OT6 OT3 OT8 OT8 OT4 OT8 OT8 OT5 OT1 OT5 OT4 OT8 OT8
```

Is the HF8 the one to blame?

Thanks again.

El 05/08/2014 a las #4, Brian Barker escribiÃ³:
```
```At 17:38 04/08/2014 +0200, Daniel R. Miguel wrote:
```
I have a table with cells that may contain OTnum, so it might contain OT0.5, OT1, OT2, OT2.5 et cetera. I would want to sum the number substring of all the cells in a row, so for example if I have this row:
```Alan    OT0,5    F    OT1    F    V    OT2    F    F   V    OT3
I would have another column with the total sum of OT:
Alan    OT0,5    F    OT1    F    V    OT2    F    F   V    OT3 6,5
(OT3+OT2+OT1+OT0.5)
```
```
Suppose those eleven items are cells A1 to K1. In the result cell, enter
=SUM(IF(LEFT(B1:K1,2)="OT",VALUE(MID(B1:K1,3,99)),0))
```
But don't press Enter or click the green tick mark; instead press Ctrl+Shift+Enter to render it an array formula. You will see that the entire formula displayed in the Input Line has been surrounded by braces - { } - but note that you cannot achieve the same result by typing these yourself.
```
```
You will presumably need to copy this formula down a column. If so, you appear to be able to achieve the correct result by copying the formula from the first cell and pasting it into others (even wholesale) or by using Edit | Fill, but not by dragging the fill handle.
```
I trust this helps.

Brian Barker

```
```

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