1 column

1. £10
2. £20

Default (2) columns

1. £10
2. £20

3 columns

1. £10
2. £20
3. £25

4 columns

1. £10
2. £15
3. £20
4. £25

5 columns

1. £10
2. £15
3. £20
4. £25
5. £30