See the pattern here
£2.05 £2.50
£6.00
£2.55 £4.25
£3.15 £6.40
£6.40
£6.80
£2.75 £3.55
£3.00 £6.00
£2.30 £2.95
£2.75 £3.65
£3.55 £11.90
- £2.50
£7.90
£9.60
£7.20
£7.10
£19.00
£7.30