See the pattern here
- £8.10
£5.10 £5.70
£13.50 £15.00
£11.40
£9.90 £11.40
£15.10 £17.60
£7.00
£10.00 £11.50
£10.40 £11.50
£9.80 £11.40
£15.00
£10.70 £12.00
£4.50
£18.90 £23.90
£3.90
£5.50