Oh, and here's the conversion from UK Litre price to U S Gallon price
1 U S Gallon = 3.785412 litres, so £1:32.9 per litre which is 1:32.9 X 1.34 (Coversion from XE.com)
so we have 1:32.9 X 1.34 = $1.78 X 3.785412 per US Gallon = $6.74 (6.738 but rounded up)