 
<translate> Mista Deane zai kashe $1.4 / lita x lita 10 = $14 don lita 10 na gas a yau. Farashin gas a kowace lita a ranar Juma'a zai zama $ 1.4 / lita - $ 0.4 / lita = $ 1 / lita. Don haka, zai kashe $1/litir x 25 liters = $25 don 25 liters na gas a ranar Juma'a. Saboda haka, Mista Deane zai kashe jimillar dala 14 + dala 25 = dala 39 don lita 35 na gas. Saboda haka amsar karshe ita ce 39. <eng> Mr. Deane will spend $1.4 / liter x 10 liters = $14 for the 10 liters of gas today. The price of the gas per liter on Friday will be $1.4 / liter - $0.4 / liter = $1 / liter. So, he will spend $1 / liter x 25 liters = $25 for the 25 liters of gas on Friday. Thus, Mr. Deane will spend a total of $14 + $25 = $39 for the 35 liters of gas. So the final answer is 39. 