```vba sub calculatesales() dim lastrow as long lastrow = cells(rows.count, 1).end(xlup).row for i = 2 to lastrow cells(i, 4).value = cells(i, 2).value * cells(i, 3).value next i end sub ```
```vba sub multiplybytwo() dim lastrow as long lastrow = cells(rows.count, 1).end(xlup).row for i = 1 to lastrow cells(i, 2).value = cells(i, 1).value * 2 next i end sub ```