1 Unit £34.99 (including postage and a barcode)
2 units £55.98 (including postage and a barcode)
3 units £83.97 (including postage, barcode and 1 free = 4 units)
4 units £111.96 (including postage, barcode and 2 free = 6 units)
5 units £139.95 (including postage, barcode and 3 free = 8 units)
6 units £167.94 (including postage, barcode and 4 free = 10 units)