Hmm I noticed that some calculations are off (compare Kantor to lololol) Both pounds Kantor pays 1.35 and lololol 1.40 one says he pays 9.45 the other one says 7. Something isnt right so here a table for the correct units:
1 US gallon = 3.78 Liter
1 Pound = 1.53 Dollar
1 Euro = 1.35 Dollar
(Dollar became stronger lately it seems)