I have a simple formula in Cell C2;

```
=SUM(A1+15000)-A1
```

I would like calc to auto fill the formula+1 for the selected cells (C2:C270)

like this

```
Cell C3;
=SUM(A1+15000)-A2
Cell C4;
=SUM(A1+15000)-A3
Cell C5;
=SUM(A1+15000)-A4
```

Is there any way to do this?

Thank you